CN105115770A - Progressive identification method for load, problematic cable and generalized displacement through simplified hybrid monitoring - Google Patents

Abstract

The invention relates to a progressive identification method for load, a problematic cable and generalized displacement through simplified hybrid monitoring. According to the method which is based on hybrid monitoring, a mechanical calculation reference model of a cable structure is established, and a unit damage monitored quantity numerical value varying matrix is obtained through calculation based on the mechanical calculation reference model. According to the approximate linear relation between current numerical value vectors of monitored quantity and current initial numerical value vectors of the monitored quantity, the unit damage monitored quantity numerical value varying matrix and current nominal damage vectors of evaluated objects to be solved, a noninferior solution of the current nominal damage vector of each evaluated object is calculated, accordingly, the health status of the core evaluated object can be identified.

Description

Simplify hybrid monitoring loading problem rope generalized displacement progressive-type recognition method

Technical field

Cable-stayed bridge, suspension bridge, the structures such as truss-frame structure have a common ground, be exactly that they have many parts bearing tensile load, as suspension cable, main push-towing rope, hoist cable, pull bar etc., the common ground of this class formation is with rope, cable or the rod member only bearing tensile load are support unit, for simplicity, such structure representation is " Cable Structure " by this method, and by all ropeway carrying-ropes of Cable Structure, carrying cable, and all rod members (being also called two power rod members) only bearing axial tension or axial compression load, be collectively referred to as simplicity " cable system ", ropeway carrying-rope is censured with " support cable " this noun in this method, carrying cable and only bear the rod member of axial tension or axial compression load, sometimes referred to as " rope ", so when using " rope " this word below, two power rod members are just referred to truss-frame structure reality.Impaired and the lax pair Cable Structure of support cable is safely a significant threat, and damaged cable and slack line are referred to as the support cable of unsoundness problem, referred to as problem cable by this method.In structure military service process, the correct identification of the health status of support cable or cable system is related to the safety of whole Cable Structure.When there is health problem in support cable, in Cable Structure military service process, may generalized displacement be there is in Cable Structure bearing, the load that Cable Structure is born also may change simultaneously, even if in fact the health status of support cable does not change, the load that Cable Structure is born also may change separately, at this complex condition, based on hybrid monitoring, (this method to judge the health status of Cable Structure to this method by the hybrid monitoring of the change of the measurable parameter to the aforementioned dissimilar Cable Structure of this section, all monitored Cable Structure characteristic parameters are referred to as " monitored amount " by this method, because now monitored amount is made up of the dissimilar measurable parameter mixing of Cable Structure, this method claims this to be hybrid monitoring) identify generalized displacement of support and problem cable, belong to engineering structure health monitoring field.

Background technology

Reject load change, Cable Structure generalized displacement of support on the impact of Cable Structure health status recognition result, thus identifies the change of the health status of structure exactly, is problem in the urgent need to address at present; Rejecting load change, the impact of Cable Structure health status change on Cable Structure generalized displacement of support recognition result, thus identify Cable Structure generalized displacement of support exactly, is also problem in the urgent need to address at present; This method discloses a kind of effective, cheap method solving this two problems.

Summary of the invention

Technical matters: this method discloses a kind of method, under the condition that cost is lower, achieve two kinds of functions, be respectively, one, rejecting generalized displacement of support and load change are on the impact of Cable Structure health status recognition result, thus identify the health status of support cable exactly; Two, this method can also reject load change and the impact of Cable Structure health status change on Cable Structure generalized displacement of support recognition result, thus identifies Cable Structure generalized displacement of support exactly.

Suo Changdu under support cable free state (now rope tensility also claims Suo Li to be 0) (is called drift, this method specially refers to that support cable two supports the drift of that section of rope between end points) can change, one of object of this method will identify the support cable that drift there occurs change exactly, and identify the knots modification of their drift, this knots modification is that the cable force adjustment of this rope provides direct basis, conveniently, the support cable that drift changes by this method is referred to as slack line.

Technical scheme: in the method, the coordinate of bearing about the X, Y, Z axis of Descartes's rectangular coordinate system is censured with " bearing volume coordinate ", alternatively becoming is the volume coordinate of bearing about X, Y, Z axis, bearing is called the volume coordinate component of bearing about this axle about the concrete numerical value of the volume coordinate of some axles, and a volume coordinate component also with bearing in this method expresses the concrete numerical value of bearing about the volume coordinate of some axles; The angular coordinate of bearing about X, Y, Z axis is censured with " bearing angular coordinate ", bearing is called the angular coordinate component of bearing about this axle about the concrete numerical value of the angular coordinate of some axles, and an angular coordinate component also with bearing in this method expresses the concrete numerical value of bearing about the angular coordinate of some axles; Censure bearing angular coordinate and bearing volume coordinate entirety with " bearing generalized coordinate ", a generalized coordinate component also with bearing in this method expresses the volume coordinate of bearing about an axle or the concrete numerical value of angular coordinate; Bearing is called support wire displacement about the change of the coordinate of X, Y, Z axis, and alternatively the change of bearing volume coordinate is called support wire displacement, and a translational component also with bearing in this method expresses the concrete numerical value of bearing about the displacement of the lines of some axles; Bearing is called angular displacement of support about the change of the angular coordinate of X, Y, Z axis, and an angular displacement component also with bearing in this method expresses the concrete numerical value of bearing about the angular displacement of some axles; Generalized displacement of support censures support wire displacement and angular displacement of support is all, and a generalized displacement component also with bearing in this method expresses the displacement of the lines of bearing about some axles or the concrete numerical value of angular displacement; Support wire displacement also can be described as translational displacement, and support settlement is support wire displacement or the translational displacement component at gravity direction.

The external force that object, structure are born can be described as load, and load comprises face load and volume load.Face load, also known as surface load, is the load acting on body surface, comprises centre-point load and distributed load two kinds.Volume load be continuous distribution in the load of interior of articles each point, as deadweight and the inertial force of object.

Centre-point load is divided into concentrated force and concentrated couple two kinds, in a coordinate system, such as in Descartes's rectangular coordinate system, a concentrated force can resolve into three components, same, a concentrated couple also can resolve into three components, if load is actually centre-point load, in the method a concentrated force component or a concentrated couple component are called a load, the now change of load is embodied as the change of a concentrated force component or a concentrated couple component.

Distributed load is divided into line distributed load and EDS maps load, the description of distributed load at least comprises the zone of action of distributed load and the size of distributed load, the size distribution intensity of distributed load is expressed, distribution intensity distribution characteristics is (such as uniform, sine function equal distribution feature) and amplitude is expressed, and (such as two distributed loads are all uniform, but its amplitude is different, can well-distributed pressure be example so that the concept of amplitude to be described: same structure bears two different well-distributed pressures, two distributed loads are all uniformly distributed loads, but the amplitude of a distributed load is 10MPa, the amplitude of another distributed load is 50MPa).If load is actually distributed load, when this method talks about the change of load, in fact refer to the change of the amplitude of distributed load distribution intensity, and the distribution characteristics of the zone of action of distributed load and distribution intensity is constant.In a coordinate system, a distributed load can resolve into several components, if the amplitude of the respective distribution intensity of several components of this distributed load changes, and the ratio of change is all not identical, so in the method the component of these several distributed loads is regarded as the independently distributed load of same quantity, now load just represents the component of a distributed load, also component identical for the amplitude changing ratio of the intensity that wherein distributes can be synthesized a distributed load or be called a load.

Volume load is that continuous distribution is in the load of interior of articles each point, as deadweight and the inertial force of object, the description of volume load at least comprises the zone of action of volume load and the size of volume load, the size distribution intensity of volume load is expressed, distribution intensity distribution characteristics is (such as uniform, linear function equal distribution feature) and amplitude is expressed, and (such as two individual stow lotuses are all uniform, but its amplitude is different, can conduct oneself with dignity for example is to illustrate the concept of amplitude: the material of two parts of same structure is different, therefore density is different, so although this volume load suffered by two parts is all uniform, but the amplitude of the volume load suffered by a part may be 10kN/m ³, the amplitude of the volume load suffered by another part is 50kN/m ³).If load is actually volume load, actual treatment is the change of the amplitude of volume load diatibution intensity in the method, and the distribution characteristics of the zone of action of volume load and distribution intensity is constant, in fact the change of the amplitude of the distribution intensity of volume load is referred to when now mentioning the change of load in the method, now, the load changed refers to the volume load that the amplitude of those distribution intensities changes.In a coordinate system, one individual stow lotus can resolve into several components (such as in Descartes's rectangular coordinate system, volume load can resolve into the component of three axles about coordinate system, that is, in Descartes's rectangular coordinate system, volume load can resolve into three components), if the amplitude of the respective distribution intensity of several components of this volume load changes, and the ratio of change is all not identical, so in the method the component of this several body stow lotus is regarded as the independently load of same quantity, also the volume sharing part of the load identical for the amplitude changing ratio of the intensity that wherein distributes can be synthesized an individual stow lotus or be called a load.

When load is embodied as centre-point load, in the method, " load unit change " in fact refers to " unit change of centre-point load ", similar, " load change " specifically refers to " change of the size of centre-point load ", " load change amount " specifically refers to " variable quantity of the size of centre-point load ", " load change degree " specifically refers to " intensity of variation of the size of centre-point load ", " the actual change amount of load " refers to " the actual change amount of the size of centre-point load ", " load changed " refers to " centre-point load that size changes ", briefly, now " so-and-so load so-and-so change " refers to " size of so-and-so centre-point load so-and-so change ".

When load is embodied as distributed load, in the method, " load unit change " in fact refers to " unit change of the amplitude of the distribution intensity of distributed load ", and the distribution characteristics of distributed load is constant, similar, " load change " specifically refers to " change of the amplitude of the distribution intensity of distributed load ", and the distribution characteristics of distributed load is constant, " load change amount " specifically refers to " variable quantity of the amplitude of the distribution intensity of distributed load ", " load change degree " specifically refers to " intensity of variation of the amplitude of the distribution intensity of distributed load ", " the actual change amount of load " specifically refers to " the actual change amount of the amplitude of the distribution intensity of distributed load ", " load changed " refers to " distributed load that changes of amplitude of distribution intensity ", briefly, now " so-and-so load so-and-so change " refers to " amplitude of the distribution intensity of so-and-so distributed load so-and-so change ", and the distribution characteristics of the zone of action of all distributed loads and distribution intensity is constant.

When load is embodied as volume load, in the method, " load unit change " in fact refers to " unit change of the amplitude of the distribution intensity of volume load ", similar, " load change " refers to " change of the amplitude of the distribution intensity of volume load ", " load change amount " refers to " variable quantity of the amplitude of the distribution intensity of volume load ", " load change degree " refers to " intensity of variation of the amplitude of the distribution intensity of volume load ", " the actual change amount of load " refers to " the actual change amount of the amplitude of the distribution intensity of volume load ", " load changed " refers to " the volume load that changes of amplitude of distribution intensity ", briefly, " so-and-so load so-and-so change " refers to " amplitude of the distribution intensity of so-and-so volume load so-and-so change ", and the distribution characteristics of the zone of action of all volume load and distribution intensity is constant.

This method specifically comprises:

Though the load of a. bearing when Cable Structure changes, when the load that Cable Structure is being born does not exceed Cable Structure initial allowable load, this method is suitable for; The initial allowable load of Cable Structure refers to the allowable load of Cable Structure when being completed, and can be obtained by conventional Mechanics Calculation; This method unitedly calls evaluated generalized displacement of support component, support cable and load to be evaluation object, if the quantity sum of the evaluated quantity of generalized displacement of support component, the quantity of support cable and load is N, namely the quantity of evaluation object is N; Determine the coding rule of evaluation object, evaluation objects all in Cable Structure numbered by this rule, this numbering will be used for generating vector sum matrix in subsequent step; This method variable k represents this numbering, k=1,2,3 ..., N; This method title " core evaluation object " specially refers to evaluated support cable in " evaluation object " and generalized displacement of support component, if the quantity sum of evaluated support cable and generalized displacement of support component is P, namely the quantity of core evaluation object is P, and this method title " secondary evaluation object " specially refers to the evaluated load in " evaluation object "; Specify when determining hybrid monitoring by the support cable of monitored Suo Li, if total Q root support cable in cable system, the monitored rope force data of Cable Structure is by M in Cable Structure ₁the M of individual appointment support cable ₁individual rope force data describes, and the change of Cable Structure Suo Li is exactly the change of the Suo Li of all appointment support cables; Each total M ₁individual cable force measurement value or calculated value characterize the rope force information of Cable Structure; M ₁it is an integer being not less than that 0 is not more than Q; Specify when determining hybrid monitoring by the measured point of monitored strain, the monitored strain data of Cable Structure can by K in Cable Structure ₂the L of individual specified point and each specified point ₂the strain of individual assigned direction describes, and the change of Cable Structure strain data is exactly K ₂the change of all tested strain of individual specified point; Each total M ₂individual strain measurement value or calculated value characterize Cable Structure strain, M ₂for K ₂and L ₂long-pending; M ₂be be not less than 0 integer; Specify when determining hybrid monitoring by the measured point of monitored angle, the monitored angle-data of Cable Structure is by K in Cable Structure ₃individual specified point, cross the L of each specified point ₃the H of individual appointment straight line, each appointment straight line ₃individual angle coordinate component describes, and the change of Cable Structure angle is exactly the change of all specified points, all appointment straight line, all angle coordinate component of specifying; Each total M ₃individual angle coordinate component measurement value or calculated value characterize the angle information of Cable Structure, M ₃for K ₃, L ₃and H ₃long-pending; M ₃it is an integer being not less than 0; Specify when determining hybrid monitoring by monitored shape data, the monitored shape data of Cable Structure is by K in Cable Structure ₄the L of individual specified point and each specified point ₄the volume coordinate of individual assigned direction describes, and the change of Cable Structure shape data is exactly K ₄the change of all coordinate components of individual specified point; Each total M ₄individual coordinates measurements or calculated value characterize Cable Structure shape, M ₄for K ₄and L ₄long-pending; M ₄it is an integer being not less than 0; The monitored amount of comprehensive above-mentioned hybrid monitoring, whole Cable Structure has M monitored amount, and M is M ₁, M ₂, M ₃and M ₄sum, definition parameter K, K is M ₁, K ₂, K ₃and K ₄sum, M should be greater than the quantity of core evaluation object, and M is less than the quantity of evaluation object; For simplicity, in the method by the monitored amount of the M listed by this step referred to as " monitored amount "; The external force that object, structure are born can be described as load, and load comprises face load and volume load; Face load, also known as surface load, is the load acting on body surface, comprises centre-point load and distributed load two kinds; Volume load be continuous distribution in the load of interior of articles each point, comprise deadweight and the inertial force of object; Centre-point load is divided into concentrated force and concentrated couple two kinds, tie up in interior coordinate system comprising Descartes's rectangular coordinate, a concentrated force can resolve into three components, same, a concentrated couple also can resolve into three components, if load is actually centre-point load, in the method a concentrated force component or a concentrated couple component being counted or added up is a load, and the now change of load is embodied as the change of a concentrated force component or a concentrated couple component; Distributed load is divided into line distributed load and EDS maps load, and the description of distributed load at least comprises the zone of action of distributed load and the size of distributed load, and the size distribution intensity of distributed load is expressed, and distribution intensity distribution characteristics and amplitude are expressed; If load is actually distributed load, when this method talks about the change of load, in fact refer to the change of the amplitude of distributed load distribution intensity, and the distribution characteristics of the zone of action of all distributed loads and distribution intensity is constant; Tie up in interior coordinate system comprising Descartes's rectangular coordinate, a distributed load can resolve into three components, if the amplitude of the respective distribution intensity of three of this distributed load components changes, and the ratio of change is all not identical, so in the method three of this distributed load components being counted or added up is three distributed loads, and now load just represents the one-component of distributed load; Volume load be continuous distribution in the load of interior of articles each point, the description of volume load at least comprises the zone of action of volume load and the size of volume load, and the size distribution intensity of volume load is expressed, distribution intensity distribution characteristics and amplitude express; If load is actually volume load, actual treatment is the change of the amplitude of volume load diatibution intensity in the method, and the distribution characteristics of the zone of action of all volume load and distribution intensity is constant, in fact the change of the amplitude of the distribution intensity of volume load is referred to when now mentioning the change of load in the method, now, the load changed refers to the volume load that the amplitude of those distribution intensities changes; Tie up in interior coordinate system comprising Descartes's rectangular coordinate, one individual stow lotus can resolve into three components, if the amplitude of the respective distribution intensity of three of this volume load components changes, and the ratio of change is all not identical, so in the method three of this volume load components being counted or added up is three distributed loads;

B. survey or consult reference materials and obtain the physical and mechanical properties parameter of the various materials that Cable Structure uses; Actual measurement or consult reference materials obtain the various materials that Cable Structure uses physical and mechanical properties parameter while, direct survey calculation obtains the Initial cable force of all support cables, composition Initial cable force vector F _o; According to comprising Cable Structure design data, the data of completion data obtain the length of all support cables when free state and Suo Li are 0, in free state time cross-sectional area and in free state time the weight of unit length, form the initial drift vector of support cable, the weight vector of the initial free unit length of initial free cross-sectional area vector sum successively, the coding rule of the element of the initial drift vector of support cable, the weight vector of the initial free unit length of initial free cross-sectional area vector sum and Initial cable force vector F _othe coding rule of element identical;

C. actual measurement or consult reference materials obtain the various materials that Cable Structure uses physical and mechanical properties parameter while, direct survey calculation obtains the measured data of initial Cable Structure, and the measured data of initial Cable Structure comprises Cable Structure centre-point load measurement data, Cable Structure distributed load measurement data, Cable Structure volume load measurement data, the initial generalized displacement measurement data of Cable Structure bearing, the initial value of all monitored amounts, the Initial cable force data of all support cables, initial Cable Structure modal data, initial Cable Structure strain data, initial Cable Structure geometric data, initial Cable Structure bearing generalized coordinate data, initial Cable Structure angle-data, initial Cable Structure spatial data is in interior measured data, while the measured data obtaining initial Cable Structure, survey calculation obtains the data can expressing the health status of support cable of the Non-destructive Testing Data comprising support cable, and the data can expressing the health status of support cable are now called support cable initial health data, the initial value of all monitored amounts forms monitored amount initial value vector C _o, monitored amount initial value vector C _othe coding rule of coding rule and M monitored amount identical, the initial generalized displacement measurement data of support cable initial health data, Cable Structure bearing and Cable Structure load measurement data are utilized to set up evaluation object initial damage vector d _o, vectorial d _orepresent with initial mechanical Calculation Basis model A _othe initial health of the evaluation object of the Cable Structure represented, evaluation object initial damage vector d _oelement number equal N, d _oelement and evaluation object be one-to-one relationship, vectorial d _othe coding rule of element identical with the coding rule of evaluation object, if d _oevaluation object corresponding to some elements be support cable, so a d in cable system _othe numerical value of this element represent the initial damage degree of corresponding support cable, if the numerical value of this element is 0, represent that the support cable corresponding to this element is intact, do not damage, if its numerical value is 100%, then represent that the support cable corresponding to this element completely loses load-bearing capacity, if its numerical value is between 0 and 100%, then represent that this support cable loses the load-bearing capacity of corresponding proportion, if d _oevaluation object corresponding to some elements be some generalized displacement components of some bearings, so d _othe numerical value of this element represent the initial value of this generalized displacement component of this bearing, if d _oevaluation object corresponding to some elements be some load, get d in this method _othis element numerical value be 0, the initial value representing the change of this load is 0, if when there is no Cable Structure bearing initial generalized displacement measurement data or can think that the initial generalized displacement of Cable Structure bearing is 0, vectorial d _oin each element numerical value relevant to Cable Structure generalized displacement of support get 0, if there is no the Non-destructive Testing Data of support cable and other are when can express the data of the health status of support cable, or can think structure original state be not damaged without relaxed state time, vectorial d _oin each element numerical value relevant to support cable get 0, initial Cable Structure bearing generalized coordinate data refer to the bearing generalized coordinate data under Cable Structure design point, and Cable Structure bearing initial generalized displacement measurement data refers to setting up initial mechanical Calculation Basis model A _otime, the generalized displacement that Cable Structure bearing occurs relative to the bearing under Cable Structure design point,

All Cable Structure data that the physical and mechanical properties parameter of the various materials d. used according to the measured data of the design drawing of Cable Structure, as-constructed drawing and initial Cable Structure, support cable initial health data, Cable Structure bearing initial generalized displacement measurement data, Cable Structure centre-point load measurement data, Cable Structure distributed load measurement data, Cable Structure volume load measurement data, Cable Structure and preceding step obtain, set up the initial mechanical Calculation Basis model A of Cable Structure _o, based on A _othe Cable Structure that calculates calculates data must closely its measured data, and difference therebetween must not be greater than 5%; Corresponding to A _oevaluation object health status with evaluation object initial damage vector d _orepresent; Corresponding to A _othe initial value monitored amount initial value vector C of all monitored amount _orepresent; d _oa _oparameter, by A _othe initial value of all monitored amount that obtains of Mechanics Calculation result and C _othe initial value of all monitored amount represented is identical, therefore alternatively C _oby A _omechanics Calculation result composition, A in the method _o, C _oand d _oconstant;

E. in the method, alphabetical i is except representing the place of number of steps significantly, and alphabetical i only represents cycle index, i.e. i-th circulation; I-th circulation needs the current initial mechanical Calculation Basis model of Cable Structure that is that set up or that set up to be designated as current initial mechanical Calculation Basis model A when starting ⁱ _o; The current initial damage vector of evaluation object that i-th circulation needs when starting is designated as d ⁱ _o, d ⁱ _ocable Structure A when representing that this circulation starts ⁱ _othe health status of evaluation object, d ⁱ _odefinition mode and d _odefinition mode identical, d ⁱ _oelement and d _oelement one_to_one corresponding; When i-th circulation starts, the initial value of all monitored amounts, with monitored amount current initial value vector C ⁱ _orepresent, vectorial C ⁱ _odefinition mode and vectorial C _odefinition mode identical, C ⁱ _oelement and C _oelement one_to_one corresponding, monitored amount current initial value vector C ⁱ _orepresent and correspond to A ⁱ _othe concrete numerical value of all monitored amount; d ⁱ _oa ⁱ _ocharacterisitic parameter, C ⁱ _oby A ⁱ _omechanics Calculation result composition; When first time, circulation started, A ⁱ _obe designated as A ¹ _o, set up A ¹ _omethod for making A ¹ _oequal A _o; When first time, circulation started, d ⁱ _obe designated as d ¹ _o, set up d ¹ _omethod for making d ¹ _oequal d _o; When first time, circulation started, C ⁱ _obe designated as C ¹ _o, set up C ¹ _omethod for making C ¹ _oequal C _o;

F. from entering the circulation being walked to p step by f here;

G. in structure military service process, actual measurement obtains the currency of all monitored amounts in Cable Structure, and all these numerical value form monitored amount current value vector C ⁱ, vectorial C ⁱdefinition mode and vectorial C _odefinition mode identical, C ⁱelement and C _oelement one_to_one corresponding, represent that identical monitored amount is at not numerical value in the same time; Monitored amount current value vector C is obtained in actual measurement ⁱsynchronization, actual measurement obtain all M in Cable Structure ₁the rope force data of root support cable, all these rope force datas composition current cable force vector F ⁱ, vectorial F ⁱelement and vectorial F _othe coding rule of element identical; Monitored amount current value vector C is obtained in actual measurement ⁱsynchronization, Actual measurement obtains all M ₁the volume coordinate of two supporting end points of root support cable, the difference of the volume coordinate component in the horizontal direction of two supporting end points is exactly two supporting end points horizontal ranges, two supporting end points horizontal range data of all support cables form current support cable two and support end points horizontal range vector, and current support cable two supports coding rule and the Initial cable force vector F of the element of end points horizontal range vector _othe coding rule of element identical;

H. at current initial mechanical Calculation Basis model A ⁱ _obasis on, carry out several times Mechanics Calculation according to step h1 to step h4, by calculate set up unit damage monitored numerical quantity transformation matrices Δ C ⁱwith evaluation object unit change vector D ⁱ _u;

H1., when i-th circulation starts, directly Δ C is obtained by method listed by step h2 to step h4 ⁱand D ⁱ _u; In other moment, when in step g to A ⁱ _oafter upgrading, Δ C must be regained by method listed by step h2 to step h4 ⁱand D ⁱ _uif, not to A in step g ⁱ _oupgrade, then directly proceed to step I herein and carry out follow-up work;

H2. at current initial mechanical Calculation Basis model A ⁱ _obasis on carry out several times Mechanics Calculation, calculation times numerically equals the quantity N of all evaluation objects, has N number of evaluation object just to have N calculating, according to the coding rule of evaluation object, calculate successively, calculating hypothesis each time only has an evaluation object on the basis of original damage or generalized displacement or load, increase unit damage or unit generalized displacement or load unit change again, concrete, if this evaluation object is a support cable in cable system, so just suppose that this support cable increases unit damage again, if this evaluation object is the generalized displacement component in a direction of a bearing, just suppose that this bearing increases unit generalized displacement again at this sense of displacement, if this evaluation object is a load, just suppose that this load increases load unit change again, use D ⁱ _ukrecord the unit damage of this increase or unit generalized displacement or load unit change, wherein k represents the numbering of the evaluation object increasing unit damage or unit generalized displacement or load unit change, D ⁱ _ukevaluation object unit change vector D ⁱ _uan element, evaluation object unit change vector D ⁱ _uthe coding rule of element and vectorial d _othe coding rule of element identical, the evaluation object increasing unit damage or unit generalized displacement or load unit change in calculating each time is again different from during other time calculates the evaluation object increasing unit damage or unit generalized displacement or load unit change again, calculate the current calculated value all utilizing mechanics method to calculate all monitored amount of Cable Structure each time, the current calculated value of all monitored amount calculated each time forms a monitored amount calculation current vector, when suppose a kth evaluation object increase again unit damage or unit generalized displacement or load unit change time, use C ⁱ _tkrepresent corresponding " monitored amount calculation current vector ", when giving the element number of each vector in this step, same coding rule should be used with other vector in this method, to ensure any one element in this step in each vector, with in other vector, number identical element, have expressed the relevant information of same monitored amount or same target, C ⁱ _tkdefinition mode and vectorial C _odefinition mode identical, C ⁱ _tkelement and C _oelement one_to_one corresponding,

H3. the vectorial C calculated each time ⁱ _tkdeduct vectorial C ⁱ _oobtain a vector, then obtain " numerical value change vector δ a C for monitored amount after each element of this vector is calculated divided by this unit damage or unit generalized displacement or load unit change numerical value supposed ⁱ _k"; N number of evaluation object is had just to have N number of " the numerical value change vector of monitored amount ";

H4. by this is N number of " the numerical value change vector of monitored amount " according to the coding rule of N number of evaluation object, " the unit damage monitored numerical quantity transformation matrices Δ C having N to arrange is formed successively ⁱ"; Unit damage monitored numerical quantity transformation matrices Δ C ⁱeach row correspond to a monitored amount unit change vector; Unit damage monitored numerical quantity transformation matrices Δ C ⁱevery a line correspond to the different unit change amplitude of same monitored amount when different evaluation object increases unit damage or unit generalized displacement or load unit change; Unit damage monitored numerical quantity transformation matrices Δ C ⁱthe coding rule of row and vectorial d _othe coding rule of element identical, unit damage monitored numerical quantity transformation matrices Δ C ⁱthe coding rule of coding rule and M monitored amount of row identical;

I. current nominal fatigue vector d is defined ⁱ _cwith current actual damage vector d ⁱ, d ⁱ _cand d ⁱelement number equal the quantity of evaluation object, d ⁱ _cand d ⁱelement and evaluation object between be one-to-one relationship, d ⁱ _celement numerical value represent the nominal fatigue degree of corresponding evaluation object or nominal generalized displacement or nominal load variable quantity, d ⁱ _cand d ⁱwith evaluation object initial damage vector d _oelement number rule identical, d ⁱ _celement, d ⁱelement and d _oelement be one-to-one relationship;

J. according to monitored amount current value vector C ⁱwith " monitored amount current initial value vector C ⁱ _o", " unit damage monitored numerical quantity transformation matrices Δ C ⁱ" and " current nominal fatigue vector d ⁱ _c" between the linear approximate relationship that exists, this linear approximate relationship can be expressed as formula 1, except d in formula 1 ⁱ _cother outer amount is known, solves formula 1 and just can calculate current nominal fatigue vector d ⁱ _c;

$C^i=C_o^i+\mathrm{\Δ}{C}^i\·d_c^i$ Formula 1

K. the current actual damage vector d utilizing formula 2 to express ⁱa kth element d ⁱ _kwith evaluation object current initial damage vector d ⁱ _oa kth element d ⁱ _okwith current nominal fatigue vector d ⁱ _ca kth element d ⁱ _ckbetween relation, calculate current actual damage vector d ⁱall elements;

formula 2

K=1 in formula 2,2,3 ..., N; d ⁱ _krepresent the current actual health status of a kth evaluation object in i-th circulation, if this evaluation object is support cable, so a d in cable system ⁱ _krepresent the order of severity of its current health problem, the support cable of unsoundness problem may be slack line, also may be damaged cable, d ⁱ _kthe degree of the lax or damage of this support cable of numerical response; From the support cable of these unsoundness problems, identify damaged cable, remaining is exactly slack line, evaluation object current actual damage vector d ⁱin correspond to slack line element numerical expression be the current actual equivalent damage degree with slack line relax level mechanic equivalent; If this evaluation object is load, so a d ⁱ _krepresent the actual change amount of this load; If this evaluation object is generalized displacement component, so a d of a bearing ⁱ _krepresent its current actual generalized displacement numerical value; By current for evaluation object actual damage vector d ⁱin with M ₁the M that root support cable is relevant ₁individual element takes out, composition support cable current actual damage vector d ^ci, support cable current actual damage vector d ^cithe coding rule of element and Initial cable force vector F _othe coding rule of element identical; Support cable current actual damage vector d ^cih element representation Cable Structure in the current actual damage amount of h root support cable, h=1,2,3 ...., M ₁; Support cable current actual damage vector d ^cimiddle numerical value be not 0 element correspond to the support cable of unsoundness problem, from the support cable of these unsoundness problems, identify damaged cable, remaining is exactly slack line; The support cable corresponding with damaged cable current actual damage vector d ^ciin element numerical expression be the current actual damage of this damaged cable, represent when element numerical value is 100% that this support cable thoroughly loses load-bearing capacity, time between 0 and 100%, represent the load-bearing capacity losing corresponding proportion; After identifying slack line, utilize support cable current actual damage vector d ^cithese slack lines of expressing, with the current actual equivalent damage degree of its relax level mechanic equivalent, utilize current cable force vector F ⁱsupport end points horizontal range vector with current support cable two, utilize initial drift vector, the weight vector of the initial free unit length of initial free cross-sectional area vector sum, the vectorial F of Initial cable force of the support cable obtained in b step _othe physical and mechanical properties parameter of the various materials utilizing the Cable Structure obtained in b step to use, by by slack line with damaged cable carry out mechanic equivalent calculate slack line, with the relax level of current actual equivalent damage degree equivalence, mechanic equivalent condition is: one, two equivalences rope without lax identical with the mechanics parameters of initial drift during not damaged, geometrical property parameter, density and material; Two, after lax or damage, the slack line of two equivalences and the Suo Li of damage rope be out of shape after overall length identical; When meeting above-mentioned two mechanic equivalent conditions, the such mechanics function of two support cables in Cable Structure is exactly identical, if after namely replacing damaged cable with the slack line of equivalence, any change can not occur Cable Structure, and vice versa; Try to achieve according to aforementioned mechanic equivalent condition the relax level that those are judged as slack line, relax level is exactly the knots modification of support cable drift, namely determines the long adjustment amount of those ropes that need adjust the support cable of Suo Li; So just achieve lax identification and the non-destructive tests of support cable; During calculating, institute's demand power is by current cable force vector F ⁱcorresponding element provides; Damaged cable and slack line are referred to as the support cable of unsoundness problem by this method, referred to as problem cable, so far this method achieve reject generalized displacement of support, load change impact, the problem cable identification of Cable Structure, achieve simultaneously reject generalized displacement of support and support cable health status variable effect, the identification of load change amount, also achieve reject load change and support cable health status variable effect, the identification of generalized displacement of support;

L. current nominal fatigue vector d is tried to achieve ⁱ _cafter, set up mark vector B according to formula 3 ⁱ, formula 4 gives mark vector B ⁱthe definition of a kth element;

$B^i={\left[\begin{array}{cccccccccc}{B}_1^i& B_2^i& \·& \·& \·& B_k^i& \·& \·& \·& B_N^i\end{array}\right]}^T$ Formula 3

formula 4

Element B in formula 4 ⁱ _kmark vector B ⁱa kth element, D ⁱ _ukevaluation object unit change vector D ⁱ _ua kth element, d ⁱ _ckevaluation object current nominal fatigue vector d ⁱ _ca kth element, they all represent the relevant information of a kth evaluation object, k=1 in formula 4,2,3 ..., N;

If m. mark vector B ⁱelement be 0 entirely, then get back to step f continue this circulation; If mark vector B ⁱelement be not 0 entirely, then enter next step, i.e. step n;

N. calculate next time according to formula 5, evaluation object current initial damage vector d namely needed for the i-th+1 time circulation ⁱ⁺¹ _oeach element;

formula 5

D in formula 5 ⁱ⁺¹ _okthe evaluation object current initial damage vector d next time, namely needed for the i-th+1 time circulation ⁱ⁺¹ _oa kth element, d ⁱ _okthis, i.e. the evaluation object of i-th circulation current initial damage vector d ⁱ _oa kth element, D ⁱ _ukthe evaluation object unit change vector D of i-th circulation ⁱ _ua kth element, B ⁱ _kthe mark vector B of i-th circulation ⁱa kth element, k=1 in formula 5,2,3 ..., N;

O. at initial mechanical Calculation Basis model A _obasis on, make the health status of rope be d ⁱ⁺¹ _oafter obtain be exactly next time, namely the i-th+1 time circulation needed for Mechanics Calculation benchmark model A ⁱ⁺¹; Obtain A ⁱ⁺¹after, obtain A by Mechanics Calculation ⁱ⁺¹in all monitored amounts, current concrete numerical value, these the monitored amounts of concrete numerical value composition next time, namely needed for the i-th+1 time circulation current initial value vector C ⁱ⁺¹ _o;

P. get back to step f, start to circulate next time.

Beneficial effect: structural healthy monitoring system is first by using sensor to carry out long-term on-line monitoring to structural response, after obtaining Monitoring Data, (or off-line) analysis is online carried out to it and obtain structural health conditions data, due to the complicacy of structure, structural healthy monitoring system needs to use a large amount of sensor equipment to carry out monitoring structural health conditions, therefore its cost is usually quite high, and therefore cost problem is a subject matter of limit structural health monitoring technique application.On the other hand, the correct identification of the health status of core evaluation object (such as suspension cable) is the indispensable ingredient of the correct identification of structural health conditions, or even they are whole, and the impact of correct identification on the correct identification of the health status of Cable Structure of the change (such as by the change of the quality and quantity of the automobile of cable-stayed bridge) of secondary evaluation object (load that such as structure is born) is very little, or even unwanted.But the quantity of the quantity of secondary evaluation object and core evaluation object is normally suitable, the quantity of secondary evaluation object is also usually greater than the quantity of core evaluation object, and the quantity of such evaluation object is usually many times of the quantity of core evaluation object.When secondary evaluation object (load) changes, in order to accurately identify core evaluation object, conventional method requires that the quantity of monitored amount (using sensor device measuring to obtain) must be more than or equal to the quantity of evaluation object, when the number ratio of the secondary evaluation object changed is larger (in fact often so), the quantity of the sensor equipment required for structural healthy monitoring system is very huge, therefore the cost of structural healthy monitoring system will become very high, unacceptablely even high.Inventor studies discovery, in the secondary evaluation object (normal load that such as structure is born, the normal load of structure refers to that the load that structure is being born is no more than the structure allowable load limited according to structural design book or structure completion book) change less time (be exactly that structure only bears normal load for load, whether the load that structure is born is normal load, can be observed by methods such as naked eyes and determine, if find that the load that structure is born is not normal load, so artificially remove, after removing improper load, structure just only bears normal load), the amplitude of variation (this instructions is called " secondary response ") of the structural response caused by them much smaller than core evaluation object change (such as support cable is impaired) caused by the amplitude of variation (this instructions is called " core response ") of structural response, secondary response and core respond total change (this instructions is called " global response ") that sum is structural response, obvious core response dominate in global response, based on this, find to choose when determining monitored amount quantity to be a bit larger tham core evaluation object quantity even if inventor studies, but much smaller than the numerical value (this method is exactly do like this) of evaluation object quantity, even if that is adopt the relatively few a lot of sensor equipment of quantity, still the state of health data of core evaluation object can accurately be obtained, meet the core demand of structural health conditions monitoring, therefore this method cost of structural healthy monitoring system of advising is more much lower than the cost of the structural healthy monitoring system required by conventional method apparently, that is this method can realize to the health status of the core evaluation object of Cable Structure with the much lower condition of cost assessment, can this benefit be used structural health monitoring technology is very important.

Embodiment

The following describes of embodiment of this method is in fact only exemplary, and object is never the application or the use that limit this method.

The first step: the quantity first confirming the load that may change that Cable Structure is born.According to the feature of the load that Cable Structure is born, confirm wherein " load likely changed ", or all load is considered as " load likely changed ", if total JZW the load that may change, i.e. total JZW secondary evaluation object.

If the quantity sum of the quantity of the quantity of generalized displacement of support component of Cable Structure, the support cable of Cable Structure and JZW " load likely changed " is N, i.e. total N number of evaluation object.To evaluation object serial number, this numbering will be used for generating vector sum matrix in subsequent step.

If the quantity sum of evaluated support cable and generalized displacement of support component is P, namely the quantity of core evaluation object is P, if the quantity of evaluated generalized displacement of support component is Z.

Monitored multiclass parameter can comprise: Suo Li, strain, angle and volume coordinate, be described below respectively:

If total Q root support cable in cable system, the monitored rope force data of Cable Structure is by M in Cable Structure ₁the M of individual appointment rope ₁individual rope force data describes, and the change of Cable Structure Suo Li is exactly the change of the Suo Li of all appointment ropes.Each total M ₁individual cable force measurement value or calculated value characterize the rope force information of Cable Structure.M ₁it is an integer being not less than 0.

The monitored strain data of Cable Structure can by K in Cable Structure ₂the L of individual specified point and each specified point ₂the strain of individual assigned direction describes, and the change of Cable Structure strain data is exactly K ₂the change of all tested strain of individual specified point.Each total M ₂(M ₂=K ₂× L ₂) individual strain measurement value or calculated value characterize Cable Structure strain.M ₂it is an integer being not less than 0.

The monitored angle-data of Cable Structure is by K in Cable Structure ₃individual specified point, cross the L of each specified point ₃the H of individual appointment straight line, each appointment straight line ₃individual angle coordinate component describes, and the change of Cable Structure angle is exactly the change of all specified points, all appointment straight line, all angle coordinate component of specifying.Each total M ₃(M ₃=K ₃× L ₃× H ₃) individual angle coordinate component measurement value or calculated value characterize the angle information of Cable Structure.M ₃it is an integer being not less than 0.

The monitored shape data of Cable Structure is by K in Cable Structure ₄the L of individual specified point and each specified point ₄the volume coordinate of individual assigned direction describes, and the change of Cable Structure shape data is exactly K ₄the change of all coordinate components of individual specified point.Each total M ₄(M ₄=K ₄× L ₄) individual coordinates measurements or calculated value characterize Cable Structure shape.M ₄it is an integer being not less than 0.

Comprehensive above-mentioned monitored amount, whole Cable Structure has M (M=M ₁+ M ₂+ M ₃+ M ₄) individual monitored amount, definition parameter K (K=M ₁+ K ₂+ K ₃+ K ₄), the quantity that M must not be less than core evaluation object adds the quantity that 4, M is less than evaluation object.

For simplicity, in the method by " monitored all parameters of Cable Structure " referred to as " monitored amount ".To M monitored amount serial number, this numbering will be used for generating vector sum matrix in subsequent step.This method represents this numbering, j=1,2,3 with variable j ..., M.

Second step: set up initial mechanical Calculation Basis model A _o.

When Cable Structure is completed, or before setting up health monitoring systems, use the direct survey calculation of conventional method to obtain the initial value of all monitored amount of Cable Structure, form monitored amount initial value vector C _o.

Obtaining monitored amount initial value vector C _owhile, use conventional method (consult reference materials or survey) to obtain physical parameter and the mechanical property parameters (such as elastic modulus, Poisson ratio) of the various materials that Cable Structure uses.

Obtaining monitored amount initial value vector C _owhile, utilize the elastic modulus data composition support cable initial elastic modulus vector E of support cable wherein _o; Actual measurement or consult reference materials obtain the various materials that Cable Structure uses physical and mechanical properties parameter while, direct survey calculation obtains the Initial cable force of all support cables, composition Initial cable force vector F _o; According to comprising Cable Structure design data, the data of completion data obtain the length of all support cables when free state and Suo Li are 0, in free state time cross-sectional area and in free state time the weight of unit length, form the initial drift vector l of support cable successively _o, initial free cross-sectional area vector A _owith the weight vector ω of initial free unit length _o, support cable initial elastic modulus vector E _o, support cable initial drift vector l _o, initial free cross-sectional area vector A _owith the weight vector ω of initial free unit length _othe coding rule of element and Initial cable force vector F _othe coding rule of element identical.

Obtaining monitored amount initial value vector C _owhile, use conventional method Actual measurement to obtain the Actual measurement data of Cable Structure.The Non-destructive Testing Data etc. that the Actual measurement data of Cable Structure comprise support cable can express the data of the health status of rope, the initial geometric data of Cable Structure, rope force data, draw-bar pull data, initial Cable Structure bearing generalized coordinate data, initial Cable Structure bearing generalized coordinate data, the initial generalized displacement measurement data of Cable Structure bearing, Cable Structure centre-point load measurement data, Cable Structure distributed load measurement data, Cable Structure volume load measurement data, Cable Structure modal data, structural strain data, structural point measurement data, the measured datas such as structure space measurement of coordinates data.Initial Cable Structure bearing generalized coordinate data refer to the bearing generalized coordinate data under Cable Structure design point, and Cable Structure bearing initial generalized displacement measurement data refers to setting up initial mechanical Calculation Basis model A _otime, the generalized displacement that Cable Structure bearing occurs relative to the bearing under Cable Structure design point.The initial geometric data of Cable Structure can be the spatial data that the spatial data of the end points of all ropes adds a series of point in structure, and object is the geometric properties according to these coordinate data determination Cable Structure.For cable-stayed bridge, initial geometric data can be the spatial data that the spatial data of the end points of all ropes adds some points on bridge two ends, so-called bridge type data that Here it is.Utilize the Non-destructive Testing Data etc. of support cable can express the data of the health status of support cable, the initial generalized displacement measurement data of Cable Structure bearing and Cable Structure load measurement data and set up evaluation object initial damage vector d _o, use d _orepresent that Cable Structure is (with initial mechanical Calculation Basis model A _orepresent) the initial health of evaluation object.If there is no the Non-destructive Testing Data of support cable and other are when can express the data of the health status of support cable, or can think structure original state be not damaged without relaxed state time, vectorial d _oin each element numerical value relevant to support cable get 0; If when there is no Cable Structure bearing initial generalized displacement measurement data or can think that the initial generalized displacement of Cable Structure bearing is 0, vectorial d _oin each element numerical value relevant to Cable Structure generalized displacement of support get 0; If d _oevaluation object corresponding to some elements be some load, get d in this method _othis element numerical value be 0, the initial value representing the change of this load is 0.The physical and mechanical properties parameter of the various materials utilizing the measured data of the design drawing of Cable Structure, as-constructed drawing and initial Cable Structure, the Non-destructive Testing Data of support cable, Cable Structure to use, utilizes mechanics method (such as finite element method) to set up initial mechanical Calculation Basis model A _o.

No matter which kind of method to obtain initial mechanical Calculation Basis model A by _o, based on A _othe Cable Structure that calculates calculates data must closely its measured data, and error generally must not be greater than 5%.Like this can utility A _othe Suo Li calculated under the analog case of gained calculates data, strain calculation data, Cable Structure shapometer count certificate and displacement meter counts certificate, Cable Structure angle-data, Cable Structure spatial data etc., measured data when reliably truly occurring close to institute's analog case.Model A _othe health status evaluation object initial damage vector d of middle support cable _orepresent.Due to based on A _othe initial value (actual measurement obtains) of the evaluation calculating all monitored amounts closely all monitored amounts, so also can be used in A _obasis on, carry out Mechanics Calculation obtains, A _othe evaluation of each monitored amount form monitored amount initial value vector C _o.Corresponding to A _oevaluation object health status with evaluation object initial damage vector d _orepresent; Corresponding to A _othe initial value monitored amount initial value vector C of all monitored amount _orepresent.D _oa _oparameter, C _oby A _omechanics Calculation result composition.

3rd step: in the method, alphabetical i is except representing the place of number of steps significantly, and alphabetical i only represents cycle index, i.e. i-th circulation; I-th circulation needs the current initial mechanical Calculation Basis model of Cable Structure that is that set up or that set up to be designated as current initial mechanical Calculation Basis model A when starting ⁱ _o; The current initial damage vector of evaluation object that i-th circulation needs when starting is designated as d ⁱ _o, d ⁱ _ocable Structure A when representing that this circulation starts ⁱ _othe health status of evaluation object, d ⁱ _odefinition mode and d _odefinition mode identical, d ⁱ _oelement and d _oelement one_to_one corresponding; When i-th circulation starts, the initial value of all monitored amounts, with monitored amount current initial value vector C ⁱ _orepresent, vectorial C ⁱ _odefinition mode and vectorial C _odefinition mode identical, C ⁱ _oelement and C _oelement one_to_one corresponding, monitored amount current initial value vector C ⁱ _orepresent and correspond to A ⁱ _othe concrete numerical value of all monitored amount; d ⁱ _oa ⁱ _ocharacterisitic parameter; C ⁱ _oby A ⁱ _omechanics Calculation result composition; When first time, circulation started, A ⁱ _obe designated as A ¹ _o, set up A ¹ _omethod for making A ¹ _oequal A _o; When first time, circulation started, d ⁱ _obe designated as d ¹ _o, set up d ¹ _omethod for making d ¹ _oequal d _o; When first time, circulation started, C ⁱ _obe designated as C ¹ _o, set up C ¹ _omethod for making C ¹ _oequal C _o.

4th step: the hardware components of pass line structural healthy monitoring system.Hardware components at least comprises: the space coordinate monitoring system of monitored amount monitoring system (such as measuring subsystem, signal conditioner etc. containing measurement of angle subsystem, cable force measurement subsystem, strain measurement subsystem, volume coordinate), the supporting end points of support cable cable force monitoring system, support cable, signal (data) collector, computing machine and communication alert equipment.The volume coordinate of the Suo Li of each monitored amount, each root support cable, the supporting end points of each root support cable must arrive by monitored system monitoring, monitoring system by the Signal transmissions that monitors to signal (data) collector; Signal is delivered to computing machine through signal picker; The health monitoring software of the evaluation object running Cable Structure is then responsible for by computing machine, comprises the signal that the transmission of tracer signal collector comes; When monitoring evaluation object health status and changing, computer control communication panalarm is reported to the police to monitor staff, owner and (or) the personnel that specify.

5th step: establishment the system software of installation and operation this method on computers, the function (i.e. all work that can complete with computing machine in this specific implementation method) such as monitoring, record, control, storage, calculating, notice, warning that this software will complete this method required by task and wants.

6th step: step starts circulation running thus, in structure military service process, actual measurement obtains the currency of all monitored amounts in Cable Structure, and all these numerical value form monitored amount current value vector C ⁱ, vectorial C ⁱdefinition mode and vectorial C _odefinition mode identical, C ⁱelement and C _oelement one_to_one corresponding, represent that identical monitored amount is at not numerical value in the same time.

Monitored amount current value vector C is obtained in actual measurement ⁱsynchronization, actual measurement obtain all M in Cable Structure ₁the rope force data of root support cable, all these rope force datas composition current cable force vector F ⁱ, vectorial F ⁱelement and vectorial F _othe coding rule of element identical; Monitored amount current value vector C is obtained in actual measurement ⁱsynchronization, Actual measurement obtains all M ₁the volume coordinate of two of root support cable supporting end points, the difference of the volume coordinate of two supporting end points component is in the horizontal direction exactly two supporting end points horizontal ranges, all M ₁two supporting end points horizontal range data of root support cable form current support cable two and support end points horizontal range vector l ⁱ _x, current support cable two supports end points horizontal range vector l ⁱ _xthe coding rule of element and Initial cable force vector F _othe coding rule of element identical.

7th step: at current initial mechanical Calculation Basis model A ⁱ _obasis on, carry out several times Mechanics Calculation according to step a to steps d, by calculate set up unit damage monitored numerical quantity transformation matrices Δ C ⁱwith evaluation object unit change vector D ⁱ _u.

A., when i-th circulation starts, Δ C is obtained by method listed by step b to steps d ⁱand D ⁱ _u; In other moment, directly proceed to the 8th step and carry out follow-up work.

B. at current initial mechanical Calculation Basis model A ⁱ _obasis on carry out several times Mechanics Calculation, vectorial d ⁱ _orepresent A ⁱ _othe health status of evaluation object, calculation times numerically equals the quantity N of all evaluation objects, has N number of evaluation object just to have N calculating; Calculate hypothesis each time and only have an evaluation object at vectorial d ⁱ _othe basis of the health status of the evaluation object represented there is unit damage or unit generalized displacement or load unit to change, concrete, if this evaluation object is a support cable in cable system, so just suppose that this support cable is at vectorial d ⁱ _othe basis that this support cable represented has a damage there is again unit damage (such as getting 5%, 10%, 20% or 30% equivalent damage is unit damage), if this evaluation object is the generalized displacement component in a direction of a bearing, just suppose this bearing at this sense of displacement at vectorial d ⁱ _othere is unit generalized displacement again (if such as this evaluation object is the translational component in the x direction of a bearing in the basis that this bearing represented has a generalized displacement, just suppose that this bearing has unit line displacement in x direction, such as get 1mm, if this evaluation object is the angular displacement component around x-axis of a bearing, just suppose that this bearing is around the angular displacement of xZhou You unit, such as get 100,000/radian), if this evaluation object is a load, just suppose that this load is at vectorial d ⁱ _othe basis that this load represented has a variable quantity increases again load unit change (if this load is distributed load, and this distributed load is line distributed load, load unit change can get 1kN/m, 2kN/m, 3kN/m or 1kNm/m, 2kNm/m, 3kNm/m etc. for unit change; If this load is distributed load, and this distributed load is EDS maps load, and load unit change can get 1MPa, 2MPa, 3MPa or 1kNm/m ², 2kNm/m ², 3kNm/m ²deng be unit change; If this load is centre-point load, and this centre-point load is couple, and load unit change can get 1kNm, 2kNm, 3kNm etc. for unit change; If this load is centre-point load, and this centre-point load is concentrated force, and load unit change can get 1kN, 2kN, 3kN etc. for unit change; If this load is volume load, load unit change can get 1kN/m ³, 2kN/m ³, 3kN/m ³deng be unit change), use D ⁱ _ukrecord this unit damage or unit generalized displacement or load unit to change, wherein k represents the numbering of the evaluation object that unit damage or unit generalized displacement or load unit change occur, D ⁱ _ukevaluation object unit change vector D ⁱ _uan element, evaluation object unit change vector D ⁱ _uthe coding rule of element and vectorial d _othe coding rule of element identical; Occur in calculating each time that the evaluation object of unit damage or unit generalized displacement or load unit change is different from during other time calculates the evaluation object occurring unit damage or unit generalized displacement or load unit change, calculate the current calculated value all utilizing mechanics method to calculate all monitored amount of Cable Structure each time, the current calculated value of all monitored amount calculated each time forms a monitored amount calculation current vector; When supposing that a kth evaluation object has unit damage or unit generalized displacement or load unit to change, available C ⁱ _tkrepresent corresponding " monitored amount calculation current vector "; When giving the element number of each vector in this step, same coding rule should be used with other vector in this method, to ensure any one element in this step in each vector, with in other vector, number identical element, have expressed the relevant information of same monitored amount or same target; C ⁱ _tkdefinition mode and vectorial C _odefinition mode identical, C ⁱ _tkelement and C _oelement one_to_one corresponding.

C. the vectorial C calculated each time ⁱ _tkdeduct vectorial C ⁱ _oobtain a vector, then the unit damage of supposition during each element of this vector is calculated divided by this or unit generalized displacement or load unit change numerical value D ⁱ _ukafter obtain " the numerical value change of a monitored amount vector δ C ⁱ _k"; N number of evaluation object is had just to have N number of " the numerical value change vector of monitored amount ".

D. by this is N number of " the numerical value change vector of monitored amount " according to the coding rule of N number of evaluation object, " the unit damage monitored numerical quantity transformation matrices Δ C having N to arrange is formed successively ⁱ"; Unit damage monitored numerical quantity transformation matrices Δ C ⁱeach row correspond to a monitored amount unit change vector; Unit damage monitored numerical quantity transformation matrices Δ C ⁱevery a line correspond to the different unit change amplitude of same monitored amount when different evaluation object increases unit damage or unit generalized displacement or load unit change; Unit damage monitored numerical quantity transformation matrices Δ C ⁱthe coding rule of row and vectorial d _othe coding rule of element identical, unit damage monitored numerical quantity transformation matrices Δ C ⁱthe coding rule of coding rule and M monitored amount of row identical.

8th step: set up linear relationship error vector e ⁱwith vectorial g ⁱ.Utilize (" the monitored amount current initial value vector C of data above ⁱ _o", " unit damage monitored numerical quantity transformation matrices Δ C ⁱ"); while the 8th step calculates each time; namely while calculating each time in hypothesis evaluation object and only having the increase unit damage of an evaluation object or unit generalized displacement or load unit change; when hypothesis kth (k=1,2,3; ..., N), when individual evaluation object increases unit damage or unit generalized displacement or load unit change, calculate composition injury vector each time, use d ⁱ _tkrepresent this injury vector, corresponding monitored amount calculation current vector is C ⁱ _tk(see the 8th step), injury vector d ⁱ _tkelement number equal the quantity of evaluation object, vectorial d ⁱ _tkall elements in only have the numerical value of an element to get to calculate each time in hypothesis increase the unit damage of the evaluation object of unit damage or unit generalized displacement or load unit change or unit generalized displacement or load unit changing value, d ⁱ _tkthe numerical value of other element get 0, that be not numbering and the supposition of the element of 0 increase the evaluation object that unit damage or unit generalized displacement or load unit change corresponding relation, be identical with the element of the same numbering of other vectors with the corresponding relation of this evaluation object; d ⁱ _tkwith evaluation object initial damage vector d _oelement number rule identical, d ⁱ _tkelement and d _oelement be one-to-one relationship.By C ⁱ _tk, C ⁱ _o, Δ C ⁱ, d ⁱ _tkbring formula (1) into, obtain a linear relationship error vector e ⁱ _k, calculate a linear relationship error vector e each time ⁱ _k; e ⁱ _ksubscript k represent kth (k=1,2,3 ..., N) and individual evaluation object increases unit damage or unit generalized displacement or load unit change.There is N number of evaluation object just to have N calculating, just have N number of linear relationship error vector e ⁱ _k, by this N number of linear relationship error vector e ⁱ _kobtaining a vector after addition, is exactly final linear relationship error vector e by each element of this vector divided by the new vector obtained after N ⁱ.Vector g ⁱequal final error vector e ⁱ.By vectorial g ⁱbe kept on the hard disc of computer of operation health monitoring systems software, for health monitoring systems software application.

$e_k^i=\mathrm{abs}(\mathrm{\Δ}{C}^i\·d_{\mathrm{tk}}^i-C_{\mathrm{tk}}^i+C_o^i)---\left(1\right)$

9th step: define current nominal fatigue vector d ⁱ _cwith current actual damage vector d ⁱ, d ⁱ _cand d ⁱelement number equal the quantity of evaluation object, d ⁱ _cand d ⁱelement and evaluation object between be one-to-one relationship, d ⁱ _cand d ⁱelement numerical value represent the degree of injury of corresponding evaluation object or unit generalized displacement or load change degree, d ⁱ _cand d ⁱwith evaluation object initial damage vector d _oelement number rule identical, d ⁱ _celement, d ⁱelement and d _oelement be one-to-one relationship.

Tenth step: according to monitored amount current value vector C ⁱwith " monitored amount current initial value vector C ⁱ _o", " unit damage monitored numerical quantity transformation matrices Δ C ⁱ" and " current nominal fatigue vector d ⁱ _c" between exist linear approximate relationship, this linear approximate relationship can be expressed as formula (2), according to multi-objective optimization algorithm calculate current nominal fatigue vector d ⁱ _cnoninferior solution, namely can reflect the solution of the change of the health status of evaluation object more exactly with reasonable error.

$C^i=C_o^i+{\mathrm{\ΔC}}^i\·d_c^i---\left(2\right)$

The Objective Programming in multi-objective optimization algorithm (GoalAttainmentMethod) can be adopted to solve current nominal fatigue vector d ⁱ _c, according to Objective Programming, formula (2) can transform the multi-objective optimization question shown in an accepted way of doing sth (3) and formula (4), and in formula (3), γ is a real number, and R is real number field, and area of space Ω limits vectorial d ⁱ _cspan (the present embodiment requirements vector d of each element ⁱ _ceach element be not less than 0, be not more than 1).Formula (3) be meant to the minimum real number γ of searching one, formula (4) is met.G (d in formula (4) ⁱ _c) defined by formula (5), the middle G (d of the product representation formula (4) of weighing vector W and γ in formula (35) ⁱ _c) and vectorial g ⁱbetween allow deviation.During actual computation vector W can with vectorial g ⁱidentical.The concrete programming realization of Objective Programming has had universal program directly to adopt.Use Objective Programming just can in the hope of current nominal fatigue vector d ⁱ _c.

$\begin{array}{cc}\min \mathrm{imize}& \mathrm{\γ}\\ \mathrm{\γ}\∈R,& d_c^i\∈\mathrm{\Ω}\end{array}---\left(3\right)$

$G\left(d_c^i\right)-\mathrm{W\γ}\≤g^i---\left(4\right)$

$G\left(d_c^i\right)=\mathrm{abs}(\mathrm{\Δ}{C}^i\·d_c^i-C^i+C_o^i)---\left(5\right)$

11 step: according to evaluation object current actual damage vector d ⁱdefinition and the definition of its element calculate current actual damage vector d ⁱeach element, thus can by d ⁱdetermine the health status of evaluation object.Current actual damage vector d ⁱa kth element d ⁱ _krepresent the current actual health status of a kth evaluation object in i-th circulation.

D ⁱ _krepresent the current actual health status of a kth evaluation object in i-th circulation, if this evaluation object is support cable, so a d in cable system ⁱ _krepresent its current actual damage, d ⁱ _krepresent when being 0 that the support cable of its correspondence is without health problem, d ⁱ _knumerical value represents when not being 0 that the support cable of its correspondence is the support cable of unsoundness problem, the support cable of unsoundness problem may be slack line, also may be damaged cable, the degree of the lax or damage of its numerical response.

D ⁱ _krepresent the current actual health status of a kth evaluation object in i-th circulation, if this evaluation object is generalized displacement component, so a d of a bearing ⁱ _krepresent its current actual generalized displacement numerical value.

D ⁱ _krepresent the current actual health status of a kth evaluation object in i-th circulation, if this evaluation object is load, so a d ⁱ _krepresent its current real load change numerical value.

By current for evaluation object actual damage vector d ⁱin the M relevant to support cable ₁individual element takes out, composition support cable current actual damage vector d ^ci, support cable current actual damage vector d ^cithe coding rule of element and Initial cable force vector F _othe coding rule of element identical.Support cable current actual damage vector d ^cih element representation Cable Structure in the current actual damage amount of h root support cable, h=1,2,3 ...., M ₁; Support cable current actual damage vector d ^cimiddle numerical value be not 0 element correspond to the support cable of unsoundness problem, from the support cable of these unsoundness problems, identify damaged cable, remaining is exactly slack line.Mirror method for distinguishing is varied; can by removing the protective seam of the support cable of unsoundness problem; visual discriminating is carried out to support cable; or carry out visual discriminating by optical imaging apparatus; also can be differentiated whether support cable is impaired by lossless detection method, UT (Ultrasonic Testing) is exactly a kind of now widely used lossless detection method.After differentiating, those do not find that support cable that damage, unsoundness problem is exactly there occurs lax rope, and needing the rope adjusting Suo Li exactly, is exactly slack line, and these ropes that need adjust Suo Li are at support cable current actual damage vector d ^ciin corresponding element numerical value (such as one of them element can use d ^ci _hrepresent) represent the degree of injury with the relax level mechanic equivalent of these support cables, just determine slack line thus, the computing method of concrete slack are described below.The support cable corresponding with damaged cable current actual damage vector d ^ciin element numerical expression be the current actual damage of this damaged cable, represent when element numerical value is 100% that this support cable thoroughly loses load-bearing capacity, time between 0 and 100%, represent the load-bearing capacity losing corresponding proportion; According to support cable current actual damage vector d ^ci, identify slack line from the support cable of unsoundness problem after, remaining is exactly damaged cable, and these damaged cables are at support cable current actual damage vector d ^cithe numerical value of the element of middle correspondence just represents its degree of injury, the numerical value of corresponding element represents when being 100% that this support cable thoroughly loses load-bearing capacity, represent time between 0 and 100% that this support cable loses the load-bearing capacity of corresponding proportion, so far just have identified damaged cable and degree of injury thereof.

Utilize support cable current actual damage vector d ^cithe slack line of expressing with the current actual equivalent damage degree of its relax level mechanic equivalent, utilize and obtain monitored amount current value vector C in the 6th step, in actual measurement ⁱsynchronization obtain current cable force vector F ⁱend points horizontal range vector l is supported with current support cable two ⁱ _x, to utilize in second step, actual measurement or consult reference materials obtain the various materials that Cable Structure uses physical and mechanical properties parameter while (also can be setting up the initial mechanical Calculation Basis model A of Cable Structure _osynchronization) obtain support cable initial elastic modulus vector E _o, support cable initial drift vector l _o, initial free cross-sectional area vector A _owith the weight vector ω of initial free unit length _othe physical and mechanical properties parameter of the various materials utilizing the Cable Structure obtained at second step to use, by by slack line with damaged cable carry out mechanic equivalent calculate slack line, with the relax level of current actual equivalent damage degree equivalence, particularly can in the hope of the relax level of these ropes (i.e. the long adjustment amount of rope) according to formula (6) or formula (7).So just achieve the lax identification of support cable.So far just damaged cable and slack line is all identified.

${\mathrm{\Δl}}_h^i=\frac{d_h^{\mathrm{ci}}}{1-d_h^{\mathrm{ci}}}\frac{F_h^i}{E_{\mathrm{oh}}{A}_{\mathrm{oh}}+F_h^i}{l}_{\mathrm{oh}}---\left(6\right)$

${\mathrm{\Δl}}_h^i=\frac{d_h^{\mathrm{ci}}}{1-d_h^{\mathrm{ci}}}\frac{F_h^i}{\left[\frac{E_{\mathrm{oh}}}{1+\frac{{\left({\mathrm{\ω}}_{\mathrm{oh}}{l}_{\mathrm{xh}}\right)}^2{A}_{\mathrm{oh}}{E}_{\mathrm{oh}}}{12{\left(F_h^i\right)}^3}}\right]A_{\mathrm{oh}}+F_h^i}{l}_{\mathrm{oh}}---\left(7\right)$

Formula (6) and the middle E of formula (7) _ohsetting up the initial mechanical Calculation Basis model A of Cable Structure _osynchronization, the elastic modulus of h root support cable, A _ohsetting up the initial mechanical Calculation Basis model A of Cable Structure _osynchronization, the cross-sectional area of h root support cable, ω _ohsetting up the initial mechanical Calculation Basis model A of Cable Structure _osynchronization, the weight of the unit length of h root support cable, l _ohsetting up the initial mechanical Calculation Basis model A of Cable Structure _osynchronization, the drift of h root support cable in Cable Structure, E _ohvectorial E _oh element, be setting up the initial mechanical Calculation Basis model A of Cable Structure _osynchronization, the elastic modulus of h root support cable in Cable Structure, F ⁱ _hobtain monitored amount current value vector C in actual measurement ⁱsynchronization, the current cable power of h root support cable, d ^ci _hthe current actual damage degree of h root support cable, l ⁱ _xhobtain monitored amount current value vector C in actual measurement ⁱsynchronization, the horizontal range of two of h root support cable supporting end points, l ⁱ _xhthat current support cable two supports end points horizontal range vector l ⁱ _xan element, current support cable two support end points horizontal range vector l ⁱ _xthe coding rule of element and initial drift vector l _othe coding rule of element identical.Item in formula (7) in [] is the Ernst equivalent elastic modulus of this support cable, just can determine support cable current slack degree vector Δ l by formula (6) or formula (7) ⁱ.Formula (7) is the correction to formula (6).

So far this method achieves the accurate identification of the health status of core evaluation object with a kind of effective, cheap method.May exact value be departed to the recognition result of the health status of secondary evaluation object more, only require the correct health status identifying core evaluation object in the method.

12 step: the computing machine in health monitoring systems regularly generates cable system health condition form automatically or by human users's health monitoring systems.

13 step: under specified requirements, the computing machine automatic operation communication alert equipment in health monitoring systems is reported to the police to monitor staff, owner and (or) the personnel that specify.

14 step: according to method establishment mark vector B in technical scheme ⁱif, mark vector B ⁱelement be 0 entirely, then get back to the 6th step and proceed health monitoring to cable system and calculating; If mark vector B ⁱelement be not 0, then after completing subsequent step entirely, enter and circulate next time.

15 step: according to method in technical scheme calculate next time (namely the i-th+1 time, i=1,2,3,4 ...) needed for circulation initial damage vector d ⁱ⁺¹ _oeach element d ⁱ⁺¹ _ok(k=1,2,3 ..., N); The second, at initial mechanical Calculation Basis model A _obasis on, make the health status of rope be d ⁱ⁺¹ _oafter obtain be exactly next time, namely the i-th+1 time (i=1,2,3,4 ...) Mechanics Calculation benchmark model A needed for circulation ⁱ⁺¹.Obtain A ⁱ⁺¹, d ⁱ⁺¹ _oafter, obtain A by Mechanics Calculation ⁱ⁺¹in all monitored amounts, current concrete numerical value, these the monitored amounts of concrete numerical value composition next time, namely needed for the i-th+1 time circulation current initial value vector C ⁱ⁺¹ _o.

16 step: get back to the 6th step, starts by the circulation of the 6th step to the 16 step.

Claims (1)

1. simplify hybrid monitoring loading problem rope generalized displacement progressive-type recognition method, it is characterized in that described method comprises:

Though the load of a. bearing when Cable Structure changes, when the load that Cable Structure is being born does not exceed Cable Structure initial allowable load, this method is suitable for; The initial allowable load of Cable Structure refers to the allowable load of Cable Structure when being completed, and can be obtained by conventional Mechanics Calculation; This method unitedly calls evaluated generalized displacement of support component, support cable and load to be evaluation object, if the quantity sum of the evaluated quantity of generalized displacement of support component, the quantity of support cable and load is N, namely the quantity of evaluation object is N; Determine the coding rule of evaluation object, evaluation objects all in Cable Structure numbered by this rule, this numbering will be used for generating vector sum matrix in subsequent step; This method variable k represents this numbering, k=1,2,3 ..., N; This method title " core evaluation object " specially refers to evaluated support cable in " evaluation object " and generalized displacement of support component, if the quantity sum of evaluated support cable and generalized displacement of support component is P, namely the quantity of core evaluation object is P, and this method title " secondary evaluation object " specially refers to the evaluated load in " evaluation object "; Specify when determining hybrid monitoring by the support cable of monitored Suo Li, if total Q root support cable in cable system, the monitored rope force data of Cable Structure is by M in Cable Structure ₁the M of individual appointment support cable ₁individual rope force data describes, and the change of Cable Structure Suo Li is exactly the change of the Suo Li of all appointment support cables; Each total M ₁individual cable force measurement value or calculated value characterize the rope force information of Cable Structure; M ₁it is an integer being not less than that 0 is not more than Q; Specify when determining hybrid monitoring by the measured point of monitored strain, the monitored strain data of Cable Structure can by K in Cable Structure ₂the L of individual specified point and each specified point ₂the strain of individual assigned direction describes, and the change of Cable Structure strain data is exactly K ₂the change of all tested strain of individual specified point; Each total M ₂individual strain measurement value or calculated value characterize Cable Structure strain, M ₂for K ₂and L ₂long-pending; M ₂be be not less than 0 integer; Specify when determining hybrid monitoring by the measured point of monitored angle, the monitored angle-data of Cable Structure is by K in Cable Structure ₃individual specified point, cross the L of each specified point ₃the H of individual appointment straight line, each appointment straight line ₃individual angle coordinate component describes, and the change of Cable Structure angle is exactly the change of all specified points, all appointment straight line, all angle coordinate component of specifying; Each total M ₃individual angle coordinate component measurement value or calculated value characterize the angle information of Cable Structure, M ₃for K ₃, L ₃and H ₃long-pending; M ₃it is an integer being not less than 0; Specify when determining hybrid monitoring by monitored shape data, the monitored shape data of Cable Structure is by K in Cable Structure ₄the L of individual specified point and each specified point ₄the volume coordinate of individual assigned direction describes, and the change of Cable Structure shape data is exactly K ₄the change of all coordinate components of individual specified point; Each total M ₄individual coordinates measurements or calculated value characterize Cable Structure shape, M ₄for K ₄and L ₄long-pending; M ₄it is an integer being not less than 0; The monitored amount of comprehensive above-mentioned hybrid monitoring, whole Cable Structure has M monitored amount, and M is M ₁, M ₂, M ₃and M ₄sum, definition parameter K, K is M ₁, K ₂, K ₃and K ₄sum, M should be greater than the quantity of core evaluation object, and M is less than the quantity of evaluation object; For simplicity, in the method by the monitored amount of the M listed by this step referred to as " monitored amount "; The external force that object, structure are born can be described as load, and load comprises face load and volume load; Face load, also known as surface load, is the load acting on body surface, comprises centre-point load and distributed load two kinds; Volume load be continuous distribution in the load of interior of articles each point, comprise deadweight and the inertial force of object; Centre-point load is divided into concentrated force and concentrated couple two kinds, tie up in interior coordinate system comprising Descartes's rectangular coordinate, a concentrated force can resolve into three components, same, a concentrated couple also can resolve into three components, if load is actually centre-point load, in the method a concentrated force component or a concentrated couple component being counted or added up is a load, and the now change of load is embodied as the change of a concentrated force component or a concentrated couple component; Distributed load is divided into line distributed load and EDS maps load, and the description of distributed load at least comprises the zone of action of distributed load and the size of distributed load, and the size distribution intensity of distributed load is expressed, and distribution intensity distribution characteristics and amplitude are expressed; If load is actually distributed load, when this method talks about the change of load, in fact refer to the change of the amplitude of distributed load distribution intensity, and the distribution characteristics of the zone of action of all distributed loads and distribution intensity is constant; Tie up in interior coordinate system comprising Descartes's rectangular coordinate, a distributed load can resolve into three components, if the amplitude of the respective distribution intensity of three of this distributed load components changes, and the ratio of change is all not identical, so in the method three of this distributed load components being counted or added up is three distributed loads, and now load just represents the one-component of distributed load; Volume load be continuous distribution in the load of interior of articles each point, the description of volume load at least comprises the zone of action of volume load and the size of volume load, and the size distribution intensity of volume load is expressed, distribution intensity distribution characteristics and amplitude express; If load is actually volume load, actual treatment is the change of the amplitude of volume load diatibution intensity in the method, and the distribution characteristics of the zone of action of all volume load and distribution intensity is constant, in fact the change of the amplitude of the distribution intensity of volume load is referred to when now mentioning the change of load in the method, now, the load changed refers to the volume load that the amplitude of those distribution intensities changes; Tie up in interior coordinate system comprising Descartes's rectangular coordinate, one individual stow lotus can resolve into three components, if the amplitude of the respective distribution intensity of three of this volume load components changes, and the ratio of change is all not identical, so in the method three of this volume load components being counted or added up is three distributed loads;

B. survey or consult reference materials and obtain the physical and mechanical properties parameter of the various materials that Cable Structure uses; Actual measurement or consult reference materials obtain the various materials that Cable Structure uses physical and mechanical properties parameter while, direct survey calculation obtains the Initial cable force of all support cables, composition Initial cable force vector F _o; According to comprising Cable Structure design data, the data of completion data obtain the length of all support cables when free state and Suo Li are 0, in free state time cross-sectional area and in free state time the weight of unit length, form the initial drift vector of support cable, the weight vector of the initial free unit length of initial free cross-sectional area vector sum successively, the coding rule of the element of the initial drift vector of support cable, the weight vector of the initial free unit length of initial free cross-sectional area vector sum and Initial cable force vector F _othe coding rule of element identical;

C. actual measurement or consult reference materials obtain the various materials that Cable Structure uses physical and mechanical properties parameter while, direct survey calculation obtains the measured data of initial Cable Structure, and the measured data of initial Cable Structure comprises Cable Structure centre-point load measurement data, Cable Structure distributed load measurement data, Cable Structure volume load measurement data, the initial generalized displacement measurement data of Cable Structure bearing, the initial value of all monitored amounts, the Initial cable force data of all support cables, initial Cable Structure modal data, initial Cable Structure strain data, initial Cable Structure geometric data, initial Cable Structure bearing generalized coordinate data, initial Cable Structure angle-data, initial Cable Structure spatial data is in interior measured data, while the measured data obtaining initial Cable Structure, survey calculation obtains the data can expressing the health status of support cable of the Non-destructive Testing Data comprising support cable, and the data can expressing the health status of support cable are now called support cable initial health data, the initial value of all monitored amounts forms monitored amount initial value vector C _o, monitored amount initial value vector C _othe coding rule of coding rule and M monitored amount identical, the initial generalized displacement measurement data of support cable initial health data, Cable Structure bearing and Cable Structure load measurement data are utilized to set up evaluation object initial damage vector d _o, vectorial d _orepresent with initial mechanical Calculation Basis model A _othe initial health of the evaluation object of the Cable Structure represented, evaluation object initial damage vector d _oelement number equal N, d _oelement and evaluation object be one-to-one relationship, vectorial d _othe coding rule of element identical with the coding rule of evaluation object, if d _oevaluation object corresponding to some elements be support cable, so a d in cable system _othe numerical value of this element represent the initial damage degree of corresponding support cable, if the numerical value of this element is 0, represent that the support cable corresponding to this element is intact, do not damage, if its numerical value is 100%, then represent that the support cable corresponding to this element completely loses load-bearing capacity, if its numerical value is between 0 and 100%, then represent that this support cable loses the load-bearing capacity of corresponding proportion, if d _oevaluation object corresponding to some elements be some generalized displacement components of some bearings, so d _othe numerical value of this element represent the initial value of this generalized displacement component of this bearing, if d _oevaluation object corresponding to some elements be some load, get d in this method _othis element numerical value be 0, the initial value representing the change of this load is 0, if when there is no Cable Structure bearing initial generalized displacement measurement data or can think that the initial generalized displacement of Cable Structure bearing is 0, vectorial d _oin each element numerical value relevant to Cable Structure generalized displacement of support get 0, if there is no the Non-destructive Testing Data of support cable and other are when can express the data of the health status of support cable, or can think structure original state be not damaged without relaxed state time, vectorial d _oin each element numerical value relevant to support cable get 0, initial Cable Structure bearing generalized coordinate data refer to the bearing generalized coordinate data under Cable Structure design point, and Cable Structure bearing initial generalized displacement measurement data refers to setting up initial mechanical Calculation Basis model A _otime, the generalized displacement that Cable Structure bearing occurs relative to the bearing under Cable Structure design point,

All Cable Structure data that the physical and mechanical properties parameter of the various materials d. used according to the measured data of the design drawing of Cable Structure, as-constructed drawing and initial Cable Structure, support cable initial health data, Cable Structure bearing initial generalized displacement measurement data, Cable Structure centre-point load measurement data, Cable Structure distributed load measurement data, Cable Structure volume load measurement data, Cable Structure and preceding step obtain, set up the initial mechanical Calculation Basis model A of Cable Structure _o, based on A _othe Cable Structure that calculates calculates data must closely its measured data, and difference therebetween must not be greater than 5%; Corresponding to A _oevaluation object health status with evaluation object initial damage vector d _orepresent; Corresponding to A _othe initial value monitored amount initial value vector C of all monitored amount _orepresent; d _oa _oparameter, by A _othe initial value of all monitored amount that obtains of Mechanics Calculation result and C _othe initial value of all monitored amount represented is identical, therefore alternatively C _oby A _omechanics Calculation result composition, A in the method _o, C _oand d _oconstant;

E. in the method, alphabetical i is except representing the place of number of steps significantly, and alphabetical i only represents cycle index, i.e. i-th circulation; I-th circulation needs the current initial mechanical Calculation Basis model of Cable Structure that is that set up or that set up to be designated as current initial mechanical Calculation Basis model A when starting ⁱ _o; The current initial damage vector of evaluation object that i-th circulation needs when starting is designated as d ⁱ _o, d ⁱ _ocable Structure A when representing that this circulation starts ⁱ _othe health status of evaluation object, d ⁱ _odefinition mode and d _odefinition mode identical, d ⁱ _oelement and d _oelement one_to_one corresponding; When i-th circulation starts, the initial value of all monitored amounts, with monitored amount current initial value vector C ⁱ _orepresent, vectorial C ⁱ _odefinition mode and vectorial C _odefinition mode identical, C ⁱ _oelement and C _oelement one_to_one corresponding, monitored amount current initial value vector C ⁱ _orepresent and correspond to A ⁱ _othe concrete numerical value of all monitored amount; d ⁱ _oa ⁱ _ocharacterisitic parameter, C ⁱ _oby A ⁱ _omechanics Calculation result composition; When first time, circulation started, A ⁱ _obe designated as A ¹ _o, set up A ¹ _omethod for making A ¹ _oequal A _o; When first time, circulation started, d ⁱ _obe designated as d ¹ _o, set up d ¹ _omethod for making d ¹ _oequal d _o; When first time, circulation started, C ⁱ _obe designated as C ¹ _o, set up C ¹ _omethod for making C ¹ _oequal C _o;

F. from entering the circulation being walked to p step by f here;

G. in structure military service process, actual measurement obtains the currency of all monitored amounts in Cable Structure, and all these numerical value form monitored amount current value vector C ⁱ, vectorial C ⁱdefinition mode and vectorial C _odefinition mode identical, C ⁱelement and C _oelement one_to_one corresponding, represent that identical monitored amount is at not numerical value in the same time; Monitored amount current value vector C is obtained in actual measurement ⁱsynchronization, actual measurement obtain all M in Cable Structure ₁the rope force data of root support cable, all these rope force datas composition current cable force vector F ⁱ, vectorial F ⁱelement and vectorial F _othe coding rule of element identical; Monitored amount current value vector C is obtained in actual measurement ⁱsynchronization, Actual measurement obtains all M ₁the volume coordinate of two supporting end points of root support cable, the difference of the volume coordinate component in the horizontal direction of two supporting end points is exactly two supporting end points horizontal ranges, two supporting end points horizontal range data of all support cables form current support cable two and support end points horizontal range vector, and current support cable two supports coding rule and the Initial cable force vector F of the element of end points horizontal range vector _othe coding rule of element identical;

H. at current initial mechanical Calculation Basis model A ⁱ _obasis on, carry out several times Mechanics Calculation according to step h1 to step h4, by calculate set up unit damage monitored numerical quantity transformation matrices Δ C ⁱwith evaluation object unit change vector D ⁱ _u;

H1., when i-th circulation starts, directly Δ C is obtained by method listed by step h2 to step h4 ⁱand D ⁱ _u; In other moment, when in step g to A ⁱ _oafter upgrading, Δ C must be regained by method listed by step h2 to step h4 ⁱand D ⁱ _uif, not to A in step g ⁱ _oupgrade, then directly proceed to step I herein and carry out follow-up work;

H2. at current initial mechanical Calculation Basis model A ⁱ _obasis on carry out several times Mechanics Calculation, calculation times numerically equals the quantity N of all evaluation objects, has N number of evaluation object just to have N calculating, according to the coding rule of evaluation object, calculate successively, calculating hypothesis each time only has an evaluation object on the basis of original damage or generalized displacement or load, increase unit damage or unit generalized displacement or load unit change again, concrete, if this evaluation object is a support cable in cable system, so just suppose that this support cable increases unit damage again, if this evaluation object is the generalized displacement component in a direction of a bearing, just suppose that this bearing increases unit generalized displacement again at this sense of displacement, if this evaluation object is a load, just suppose that this load increases load unit change again, use D ⁱ _ukrecord the unit damage of this increase or unit generalized displacement or load unit change, wherein k represents the numbering of the evaluation object increasing unit damage or unit generalized displacement or load unit change, D ⁱ _ukevaluation object unit change vector D ⁱ _uan element, evaluation object unit change vector D ⁱ _uthe coding rule of element and vectorial d _othe coding rule of element identical, the evaluation object increasing unit damage or unit generalized displacement or load unit change in calculating each time is again different from during other time calculates the evaluation object increasing unit damage or unit generalized displacement or load unit change again, calculate the current calculated value all utilizing mechanics method to calculate all monitored amount of Cable Structure each time, the current calculated value of all monitored amount calculated each time forms a monitored amount calculation current vector, when suppose a kth evaluation object increase again unit damage or unit generalized displacement or load unit change time, use C ⁱ _tkrepresent corresponding " monitored amount calculation current vector ", when giving the element number of each vector in this step, same coding rule should be used with other vector in this method, to ensure any one element in this step in each vector, with in other vector, number identical element, have expressed the relevant information of same monitored amount or same target, C ⁱ _tkdefinition mode and vectorial C _odefinition mode identical, C ⁱ _tkelement and C _oelement one_to_one corresponding,

H3. the vectorial C calculated each time ⁱ _tkdeduct vectorial C ⁱ _oobtain a vector, then obtain " numerical value change vector δ a C for monitored amount after each element of this vector is calculated divided by this unit damage or unit generalized displacement or load unit change numerical value supposed ⁱ _k"; N number of evaluation object is had just to have N number of " the numerical value change vector of monitored amount ";

H4. by this is N number of " the numerical value change vector of monitored amount " according to the coding rule of N number of evaluation object, " the unit damage monitored numerical quantity transformation matrices Δ C having N to arrange is formed successively ⁱ"; Unit damage monitored numerical quantity transformation matrices Δ C ⁱeach row correspond to a monitored amount unit change vector; Unit damage monitored numerical quantity transformation matrices Δ C ⁱevery a line correspond to the different unit change amplitude of same monitored amount when different evaluation object increases unit damage or unit generalized displacement or load unit change; Unit damage monitored numerical quantity transformation matrices Δ C ⁱthe coding rule of row and vectorial d _othe coding rule of element identical, unit damage monitored numerical quantity transformation matrices Δ C ⁱthe coding rule of coding rule and M monitored amount of row identical;

I. current nominal fatigue vector d is defined ⁱ _cwith current actual damage vector d ⁱ, d ⁱ _cand d ⁱelement number equal the quantity of evaluation object, d ⁱ _cand d ⁱelement and evaluation object between be one-to-one relationship, d ⁱ _celement numerical value represent the nominal fatigue degree of corresponding evaluation object or nominal generalized displacement or nominal load variable quantity, d ⁱ _cand d ⁱwith evaluation object initial damage vector d _oelement number rule identical, d ⁱ _celement, d ⁱelement and d _oelement be one-to-one relationship;

J. according to monitored amount current value vector C ⁱwith " monitored amount current initial value vector C ⁱ _o", " unit damage monitored numerical quantity transformation matrices Δ C ⁱ" and " current nominal fatigue vector d ⁱ _c" between the linear approximate relationship that exists, this linear approximate relationship can be expressed as formula 1, except d in formula 1 ⁱ _cother outer amount is known, solves formula 1 and just can calculate current nominal fatigue vector d ⁱ _c;

$C^i=C_o^i+{\mathrm{\ΔC}}^i\·d_c^i$ Formula 1

K. the current actual damage vector d utilizing formula 2 to express ⁱa kth element d ⁱ _kwith evaluation object current initial damage vector d ⁱ _oa kth element d ⁱ _okwith current nominal fatigue vector d ⁱ _ca kth element d ⁱ _ckbetween relation, calculate current actual damage vector d ⁱall elements;

formula 2

K=1 in formula 2,2,3 ..., N; d ⁱ _krepresent the current actual health status of a kth evaluation object in i-th circulation, if this evaluation object is support cable, so a d in cable system ⁱ _krepresent the order of severity of its current health problem, the support cable of unsoundness problem may be slack line, also may be damaged cable, d ⁱ _kthe degree of the lax or damage of this support cable of numerical response; From the support cable of these unsoundness problems, identify damaged cable, remaining is exactly slack line, evaluation object current actual damage vector d ⁱin correspond to slack line element numerical expression be the current actual equivalent damage degree with slack line relax level mechanic equivalent; If this evaluation object is load, so a d ⁱ _krepresent the actual change amount of this load; If this evaluation object is generalized displacement component, so a d of a bearing ⁱ _krepresent its current actual generalized displacement numerical value; By current for evaluation object actual damage vector d ⁱin with M ₁the M that root support cable is relevant ₁individual element takes out, composition support cable current actual damage vector d ^ci, support cable current actual damage vector d ^cithe coding rule of element and Initial cable force vector F _othe coding rule of element identical; Support cable current actual damage vector d ^cih element representation Cable Structure in the current actual damage amount of h root support cable, h=1,2,3 ...., M ₁; Support cable current actual damage vector d ^cimiddle numerical value be not 0 element correspond to the support cable of unsoundness problem, from the support cable of these unsoundness problems, identify damaged cable, remaining is exactly slack line; The support cable corresponding with damaged cable current actual damage vector d ^ciin element numerical expression be the current actual damage of this damaged cable, represent when element numerical value is 100% that this support cable thoroughly loses load-bearing capacity, time between 0 and 100%, represent the load-bearing capacity losing corresponding proportion; After identifying slack line, utilize support cable current actual damage vector d ^cithese slack lines of expressing, with the current actual equivalent damage degree of its relax level mechanic equivalent, utilize current cable force vector F ⁱsupport end points horizontal range vector with current support cable two, utilize initial drift vector, the weight vector of the initial free unit length of initial free cross-sectional area vector sum, the vectorial F of Initial cable force of the support cable obtained in b step _othe physical and mechanical properties parameter of the various materials utilizing the Cable Structure obtained in b step to use, by by slack line with damaged cable carry out mechanic equivalent calculate slack line, with the relax level of current actual equivalent damage degree equivalence, mechanic equivalent condition is: one, two equivalences rope without lax identical with the mechanics parameters of initial drift during not damaged, geometrical property parameter, density and material; Two, after lax or damage, the slack line of two equivalences and the Suo Li of damage rope be out of shape after overall length identical; When meeting above-mentioned two mechanic equivalent conditions, the such mechanics function of two support cables in Cable Structure is exactly identical, if after namely replacing damaged cable with the slack line of equivalence, any change can not occur Cable Structure, and vice versa; Try to achieve according to aforementioned mechanic equivalent condition the relax level that those are judged as slack line, relax level is exactly the knots modification of support cable drift, namely determines the long adjustment amount of those ropes that need adjust the support cable of Suo Li; So just achieve lax identification and the non-destructive tests of support cable; During calculating, institute's demand power is by current cable force vector F ⁱcorresponding element provides; Damaged cable and slack line are referred to as the support cable of unsoundness problem by this method, referred to as problem cable, so far this method achieve reject generalized displacement of support, load change impact, the problem cable identification of Cable Structure, achieve simultaneously reject generalized displacement of support and support cable health status variable effect, the identification of load change amount, also achieve reject load change and support cable health status variable effect, the identification of generalized displacement of support;

L. current nominal fatigue vector d is tried to achieve ⁱ _cafter, set up mark vector B according to formula 3 ⁱ, formula 4 gives mark vector B ⁱthe definition of a kth element;

$B^i={\left[\begin{array}{cccccccccc}{B}_1^i& B_2^i& \·& \·& \·& B_k^i& \·& \·& \·& B_N^i\end{array}\right]}^T$ Formula 3

formula 4

Element B in formula 4 ⁱ _kmark vector B ⁱa kth element, D ⁱ _ukevaluation object unit change vector D ⁱ _ua kth element, d ⁱ _ckevaluation object current nominal fatigue vector d ⁱ _ca kth element, they all represent the relevant information of a kth evaluation object, k=1 in formula 4,2,3 ..., N;

If m. mark vector B ⁱelement be 0 entirely, then get back to step f continue this circulation; If mark vector B ⁱelement be not 0 entirely, then enter next step, i.e. step n;

N. calculate next time according to formula 5, evaluation object current initial damage vector d namely needed for the i-th+1 time circulation ⁱ⁺¹ _oeach element;

formula 5

D in formula 5 ⁱ⁺¹ _okthe evaluation object current initial damage vector d next time, namely needed for the i-th+1 time circulation ⁱ⁺¹ _oa kth element, d ⁱ _okthis, i.e. the evaluation object of i-th circulation current initial damage vector d ⁱ _oa kth element, D ⁱ _ukthe evaluation object unit change vector D of i-th circulation ⁱ _ua kth element, B ⁱ _kthe mark vector B of i-th circulation ⁱa kth element, k=1 in formula 5,2,3 ..., N;

O. at initial mechanical Calculation Basis model A _obasis on, make the health status of rope be d ⁱ⁺¹ _oafter obtain be exactly next time, namely the i-th+1 time circulation needed for Mechanics Calculation benchmark model A ⁱ⁺¹; Obtain A ⁱ⁺¹after, obtain A by Mechanics Calculation ⁱ⁺¹in all monitored amounts, current concrete numerical value, these the monitored amounts of concrete numerical value composition next time, namely needed for the i-th+1 time circulation current initial value vector C ⁱ⁺¹ _o;

P. get back to step f, start to circulate next time.