CN109466696A - A kind of experimental rig and its test method for ship rolling hydrodynamic measurement - Google Patents
A kind of experimental rig and its test method for ship rolling hydrodynamic measurement Download PDFInfo
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- CN109466696A CN109466696A CN201811289357.0A CN201811289357A CN109466696A CN 109466696 A CN109466696 A CN 109466696A CN 201811289357 A CN201811289357 A CN 201811289357A CN 109466696 A CN109466696 A CN 109466696A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/20—Designing vessels; Predicting their performance using towing tanks or model basins for designing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B79/00—Monitoring properties or operating parameters of vessels in operation
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- Ocean & Marine Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
A kind of test model for ship rolling hydrodynamic measurement of the present invention, including ship model, forced rolling mechanism is equipped with inside ship model, forced rolling mechanism includes being successively arranged motor from right to left, reduction gear box, transition axis, torque sensor and rolling flange, the lower end surface of forced rolling mechanism is fixedly connected by support with the upper surface inside ship model, rolling flange is connect by vertical rod with vertical rod bracket, vertical rod branch is set up in the surface of rolling flange, the left and right ends of vertical rod cradle top are fixedly connected with center side bridge, motor is connect with controller, controller is connect with control software, instruction is issued by control software, by controller control motor rotation, turn signal feeds back control software again；The present invention is used for the test model of ship rolling hydrodynamic measurement, using polar integral analytic approach, determines rolling additional inertial and damped coefficient in Ship Controling and the sea-keeping equation of motion, improves ship rolling hydrodynamic test technology and rolling motion forecast is horizontal.
Description
Technical field
The present invention relates to a kind of test method more particularly to a kind of test methods for ship rolling hydrodynamic measurement.
Background technique
It is related to two very important parameters, rolling additional inertial and cross when ship seakeeping and maneuverability numerical simulation
Shake damping.In terms of numerical value calculating, using potential flow theories can excessively high these parameters of estimation because this obviously by viscosity shadow
It rings, is attempting to solve roll damping, but the complexity due to calculating flow field using viscosity flow method both at home and abroad at present, it is not biggish
Progress.In terms of model test, free roll test when these parameters can pass through zero power test is analyzed to obtain, i.e., in advance by ship
It is molded into some Angle of Heel, decontrols free rolling after ship model, and gradually decay, but ship model is in the mistake for being pressed onto a certain Angle of Heel
Transverse shifting is easy to produce in journey, in addition to this, 40 degree or more big angles occur for rolling and paralysed ship time when shipping high speed navigates by water
Rolling is spent, traditional measurement method is no longer applicable in these situations, it is difficult to move to ship and carry out accurate forecast.
To go through no longer be simple harmonic curve in terms of test data analyzer, when the rolling moment generated for wide-angle rolling, is adopted
It is no longer suitable with traditional Phase resolved method.
To sum up, the generally existing following problems of existing Phase resolved method: 40 degree or more big angles occur for 1. rolling and paralysed ship time
The case where spending rolling can not be applicable in；2. being difficult to move ship and carrying out accurate forecast；3. ship model is in the mistake for being pressed onto a certain Angle of Heel
Transverse shifting is easy to produce in journey.
Therefore, for existing Phase resolved method rolling and paralysed ship time there is a situation where 40 degree or more wide-angle rolling can not
It is applicable in, is difficult to be easy to produce lateral shifting during being pressed onto a certain Angle of Heel to ship movement progress accurate forecast and ship model
The problems such as dynamic, become those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The present invention is to solve existing Phase resolved method rolling and paralysed ship time there is a situation where 40 degree or more wide-angle rolling
It can not be applicable in, be difficult to be easy to produce cross during being pressed onto a certain Angle of Heel to ship movement progress accurate forecast and ship model
To the problems such as movement, the test model and method for ship rolling hydrodynamic measurement are provided.
To achieve the above object, the invention adopts the following technical scheme:
A kind of test model for ship rolling hydrodynamic measurement, including ship model 1 are provided, is set inside the ship model 1
There is forced rolling mechanism 2, the forced rolling mechanism 2 includes being successively arranged motor 201, reduction gear box 202, mistake from right to left
Cross axis 203, torque sensor 204 and rolling flange 205, the lower end surface of the forced rolling mechanism 2 by support 3 with it is described
Upper surface inside ship model 1 is fixedly connected, and the rolling flange 205 is connect by vertical rod 4 with vertical rod bracket 5, described to hang down
Straight-bar bracket 5 is set to the surface of the rolling flange 205, the left and right ends at 5 top of vertical rod bracket and center side bridge 6
It is fixedly connected, the motor 201 is connect with controller 7, is controlled the motor 201 by the controller 7 and is rotated, turn signal is again
Feed back the controller 7；The torque sensor 204 and the motor 201 are connect with data acquisition process platform 8, are passed through
The data acquisition process platform 8 acquires the signal on the torque sensor 204 and the motor 201.
Further, the left and right ends at 5 top of vertical rod bracket pass through bolt and are fixedly connected with center side bridge 6.
Further, the rolling flange 205 is fixedly connected with the vertical rod 4, and the rolling flange 205 hangs down with described
The contact face of straight-bar 4 be it is rectangular, the ship model 1 along pond length direction or perpendicular to pond length direction install.
Further, the left side of the rolling flange 205 is set there are two angle limit instrument 9.
Further, the inner bottom surface of the ship model 1 is smooth, and the support 3 is left and right symmetrically arranged inside the ship model 1
On middle buttocks.
Further, the axle center of the motor 201 and the center of gravity of the ship model 1 are contour.
Further, several weights are embedded with inside the ship model 1.
Further, the motor 201 7 is connected with the control by signal wire, the torque sensor 204 and described
Motor 201 is connected with data acquisition process platform 8 by signal wire.
Provide a kind of test method for ship rolling hydrodynamic measurement, which comprises the following steps:
Step 1: carrying out counterweight to the ship model 1 by standard test weight, the center of gravity and inertia of the ship model 1 are adjusted
Section；
Step 2: being put into pond after weighing to the ship model 1, the waterline position of ship model 1 is regulated, passes through liter
Dropping the center side bridge 6 is aligned the lower end surface of the center side bridge 6 and the upper surface of the rolling flange 205, and locking should
Position；
Step 3: after opening the motor 201 by the controller 7, described on ship model 1 described in transverse shifting
Standard test weight reads roll angle and the standard test weight moving distance before and after movement, calculates the ship model 1
Practical metacentric height h；
Step 4: obtaining the natural rolling period of the ship model 1 by rolling curve；By curve of declining angle, return
Analysis obtains roll damping and additional inertial；
Step 5: determine the forced rolling period, by step 4 obtain the ship model 1 the natural rolling period with
Afterwards, as reference, the forced rolling period is set in its vicinity, carries out the forced rolling test of different rolling periods, generally not
It in less than 5 periods, is gone through when measuring roll angle and rolling moment；
Step 6: by the roll angle collected in metacentric height h obtained in step 3 and step 5 and cross
It is gone through when shaking torque, using polarity check method and Least Square Regression Analysis method, obtains ship model by rolling motion equation
Roll damping and additional inertial, respectively 2N, B and
Further, the rolling motion equation are as follows:
Wherein, ship quality m (kg) in formula, D=mg, g are acceleration of gravity, g=9.81m/s2,For forced rolling angle
Amplitude (°),It is hull around X-axis inertia (kg.m2),To be surveyed rolling moment amplitude (Nm),It is linear to hinder for phase difference
Buddhist nun 2N, nonlinear dampling B, △ I φ are hull around X-axis inertia (kg.m2), h is ship model metacentric height (m).
Formula bcde is brought into equation a, and integral is taken to the both sides formula aXXX is rolling
Torque obtains:By institute's measuring moment when go through and take integral
It obtains.WithFor abscissa,For ordinate, carries out regression analysis and obtain
Formula bcde is brought into equation a, and integral is taken to the both sides formula a
:
For linear term, low-angle and low-frequency forced rolling test are first carried out, B=0, obtains at this time
By surveyed rolling moment when go through and take integral
It obtains.WithFor abscissa,For
Ordinate, regression analysis obtain 2N；
For nonlinear terms, carrying out wide-angle and tested from low frequency to high-frequency forced rolling, 2N is obtained by above-mentioned,
B are as follows:
By institute's measuring moment when go through and take integralIt obtains.
The present invention by adopting the above technical scheme, compared with prior art, has the following technical effect that
Provided by the present invention for the test model and its method of ship rolling hydrodynamic measurement, ship when being able to achieve zero power test
Mould installs test along perpendicular to pond length direction, and the wave for avoiding ship model rolling from generating is superimposed the influence to test；It realizes
The high speed of a ship or plane causes rolling hydrodynamic measurement and the analysis of ship model attitudes vibration, while it is horizontal to realize ship model wide-angle under paralysed boat state
Hydrodynamic measurement and analysis when shaking；Also rolling hydrodynamic measurement and the analysis of ship model under wave environment may be implemented.For institute
It is gone through when the rolling moment of survey and movement, not by whether being that simple harmonic curve is limited, rolling hydrodynamic(al) is obtained using polar integral method
Force coefficient.
The present invention uses polar integral analytic approach, determines the rolling additional inertial in Ship Controling and the sea-keeping equation of motion
And damped coefficient, it improves ship rolling hydrodynamic test technology and rolling motion forecast is horizontal.
Detailed description of the invention
Fig. 1 is side view of the present invention for the test model of ship rolling hydrodynamic measurement；
Fig. 2 is rearview of the present invention for the test method of ship rolling hydrodynamic measurement；
Fig. 3 is top view of the present invention for the test method of ship rolling hydrodynamic measurement；
Wherein, each appended drawing reference are as follows:
1- ship model, 2- forced rolling mechanism, 201- motor, 202- reduction gear box, 203- transition axis, 204- torque sensing
Device, 205- rolling flange, 3- support, 4- vertical rod, 5- vertical rod bracket, 6- center side bridge, 7- controller, at 8- data acquisition
Platform, 9- angle limit instrument.
Specific embodiment
The present invention is described in more detail below by specific embodiment, for a better understanding of the present invention,
But following embodiments are not intended to limit the scope of the invention.
As shown in Figure 1-3, include ship model 1, be equipped with forced rolling mechanism 2 inside ship model 1, forced rolling mechanism 2 include from
Right-to-left is successively arranged motor 201, reduction gear box 202, transition axis 203, torque sensor 204 and rolling flange 205, by force
The lower end surface of rolling mechanism 2 processed is fixedly connected by support 3 with the upper surface inside ship model 1, and rolling flange 205 passes through vertical rod
4 connect with vertical rod bracket 5, and vertical rod bracket 5 is set to the surface of rolling flange 205, the left and right two at 5 top of vertical rod bracket
End is fixedly connected with center side bridge 6, and motor 201 is connect with controller 7, is controlled motor 201 by controller 7 and is rotated, turn signal
Controller 7 is fed back again；Torque sensor 204 and motor 201 are connect with data acquisition process platform 8, at data acquisition
Platform 8 acquires the signal on torque sensor 204 and motor 201.
The one aspect of the present embodiment, as shown in Figure 1-3, the left and right ends at the top of vertical rod bracket 5 pass through bolt with
Center side bridge 6 is fixedly connected.
The one aspect of the present embodiment, as shown in Figure 1-3, the rolling flange 205 is fixedly connected with the vertical rod 4,
The contact face of the rolling flange 205 and the vertical rod 4 be it is rectangular, the ship model 1 along pond length direction or perpendicular to
The installation of pond length direction.
The one aspect of the present embodiment, as shown in Figure 1-3, rolling flange 205 is fixedly connected with vertical rod 4, rolling flange
205 with the contact face of vertical rod 4 be it is rectangular, the installation of ship model 1 can choose along pond length direction, also can choose vertical
In pond length direction.
The one aspect of the present embodiment, as shown in Figure 1-3, the left side of rolling flange 205 is set, there are two angle limit instrument
9。
The one aspect of the present embodiment, as shown in Figure 1-3, the inner bottom surface of ship model 1 is smooth, support 3 be left and right symmetrically arranged in
On middle buttocks inside ship model 1.
The one aspect of the present embodiment, as shown in Figure 1-3, the axle center of motor 201 and the center of gravity of ship model 1 are contour.
The one aspect of the present embodiment, as shown in Figure 1-3, several weights are embedded with inside ship model 1.
The one aspect of the present embodiment, as shown in Figure 1-3, motor 201 is connected with control 7 by signal wire, torque sensing
Device 204 and motor 201 are connected with data acquisition process platform 8 by signal wire.
The present embodiment provides a kind of test methods for ship rolling hydrodynamic measurement, comprising the following steps:
Step 1: carrying out counterweight to ship model 1 by standard test weight, the center of gravity and inertia of ship model 1 are adjusted；
Step 2: being put into pond after weighing to ship model 1, the waterline position of ship model 1 is regulated, by lifting
Centre side bridge 6 is aligned the lower end surface of center side bridge 6 and the upper surface of rolling flange 205, and locks the position；
Step 3:, by the standard test weight on transverse shifting ship model 1, reading and moving after opening motor 201 by controller 7
Roll angle and standard test weight moving distance before and after dynamic calculate the practical metacentric height h of ship model 1；
Step 4: obtaining the natural rolling period of ship model 1 by rolling curve；Pass through curve of declining angle, regression analysis
Obtain roll damping and additional inertial；
Step 5: the forced rolling period is determined, after the natural rolling period by the ship model 1 of step 4 acquisition, with this
For reference, the forced rolling period is set in its vicinity, carries out the forced rolling test of different rolling periods, it is general to be no less than 5
Period is gone through when measuring roll angle and rolling moment；
Step 6: when by collected roll angle in metacentric height h obtained in step 3 and step 5 and rolling moment
It goes through, using polarity check method and Least Square Regression Analysis method, obtains the roll damping of ship model by rolling motion equation
And additional inertial, respectively 2N, B and
Further, rolling motion equation is
Wherein, ship quality m (kg) in formula, D=mg, g are acceleration of gravity, g=9.81m/s2,For forced rolling angle
Amplitude (°),It is hull around X-axis inertia (kg.m2),To be surveyed rolling moment amplitude (Nm),It is linear to hinder for phase difference
Buddhist nun 2N, nonlinear dampling B, △ I φ are hull around X-axis inertia (kg.m2), h is ship model metacentric height (m).
Formula bcde is brought into equation a, and integral is taken to the both sides formula a
XXX is rolling moment, is obtained:By institute's measuring moment when go through and take integralIt obtains.WithFor abscissa,For
Ordinate carries out regression analysis and obtains
Formula bcde is brought into equation a, and integral is taken to the both sides formula a
:
For linear term, low-angle and low-frequency forced rolling test are first carried out, B=0, obtains at this time
By surveyed rolling moment when go through and take integral
It obtains.WithFor abscissa,For
Ordinate, regression analysis obtain 2N；
For nonlinear terms, carrying out wide-angle and tested from low frequency to high-frequency forced rolling, 2N is obtained by above-mentioned,
B are as follows:By institute's measuring moment when go through and take integral
It obtains.
The present embodiment provides a kind of installation methods for ship rolling hydrodynamic measurement model, comprising the following steps:
Step 1: vertical rod bracket 5 is installed on center side bridge 2, the horizontal and vertical of installation is kept.
Step 2: forced rolling mechanism 2 is fixedly attached to the middle vertical profile line position in ship model 1, and make forced rolling mechanism 2
Center of rotation it is consistent with the height of C.G. of ship model 1.
Step 3: in ship model 1 rolling flange 205 front end, setting angle limit instrument 10, be maintained at 2mm between the two
Range with for.
Step 4: carrying out the center of gravity and inertia adjusting of ship model 1, keep it similar to the mass distribution of real ship.
Step 5: vertical rod 4 and rolling flange 205 are connected.The drinking water shape of ship model 1 is kept by the lifting of center side bridge 6
State is constant.
Step 6: motor 201 is connected with controller 7 by signal wire, control software 8 sends motor message to controller 7
Instruction.
Step 7: data acquisition process platform 9 is connect with torque sensor 204 and motor 201 by signal wire.
The present invention is directed to existing Phase resolved method rolling and paralysed ship for the test method of ship rolling hydrodynamic measurement
The case where 40 degree of Shi Fasheng or more wide-angle rolling, can not be applicable in, be difficult to pressing ship movement progress accurate forecast and ship model
To the problems such as being easy to produce transverse shifting during a certain Angle of Heel, the present invention uses polar integral analytic approach, determines ship
Manipulation with the sea-keeping equation of motion in rolling additional inertial and damped coefficient, improve ship rolling hydrodynamic test technology and
Rolling motion forecast is horizontal.
Above the specific embodiment of this practical test method for ship rolling hydrodynamic measurement retouch in detail
It states, but it is merely an example, the present invention is not restricted to particular embodiments described above.For those skilled in the art
Speech, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention.Therefore, the present invention is not being departed from
Spirit and scope under made equal transformation and modification, all should be contained within the scope of the invention.
Claims (11)
1. a kind of experimental rig for ship rolling hydrodynamic measurement, including ship model (1), which is characterized in that the ship model (1)
Inside be equipped with forced rolling mechanism (2), the forced rolling mechanism (2) include from right to left sequentially connected motor (201), subtract
Fast gear-box (202), transition axis (203), torque sensor (204) and rolling flange (205)；The forced rolling mechanism
(2) lower end surface is fixedly connected by support (3) upper surface internal with the ship model (1), and the rolling flange (205) passes through
Vertical rod (4) is connect with vertical rod bracket (5), and the vertical rod bracket (5) is set to the surface of the rolling flange (205),
Left and right ends at the top of the vertical rod bracket (5) are fixedly connected with center side bridge (6), the motor (201) and controller (7)
Connection controls the motor (201) by the controller (7) and rotates, and turn signal feeds back the controller (7) again；It is described
Torque sensor (204) and the motor (201) are connect with data acquisition process platform (8), pass through the data acquisition process
Platform (8) acquires the signal on the torque sensor (204) and the motor (201).
2. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that described vertical
Left and right ends at the top of bar bracket (5) pass through bolt and are fixedly connected with the center side bridge (6).
3. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that the rolling
Flange (205) is fixedly connected with the vertical rod (4), and the rolling flange (205) and the contact face of the vertical rod (4) are
Rectangular, the ship model (1) is installed along pond length direction or perpendicular to pond length direction.
4. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that the rolling
The left side of flange (205) is set there are two angle limit instrument (9).
5. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that the ship model
(1) inner bottom surface is smooth, and the support (3) is left and right symmetrically arranged on the internal middle buttocks of the ship model (1).
6. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that the motor
(201) center of gravity in axle center and the ship model (1) is contour.
7. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that the ship model
(1) internal to be embedded with several weights.
8. the experimental rig according to claim 1 for ship rolling hydrodynamic measurement, which is characterized in that the motor
(201) it is connected with the controller (7) by signal wire, the torque sensor (204) and the motor (201) are adopted with data
Collect processing platform (8) to be connected by signal wire.
9. a kind of test method for being used for ship rolling hydrodynamic measurement as described in claim any one of 1-8, which is characterized in that
The following steps are included:
Step 1: carrying out counterweight to the ship model (1) by standard test weight, the center of gravity and inertia of the ship model (1) are adjusted
Section；
Step 2: being put into pond after weighing to the ship model (1), the waterline position of ship model (1) is regulated, passes through liter
Dropping the center side bridge (6) is aligned the lower end surface of the center side bridge (6) and the upper surface of the rolling flange (205), and
Lock the position；
Step 3: passing through the institute on ship model described in transverse shifting (1) after opening the motor (201) by the controller (7)
Standard test weight is stated, roll angle and the standard test weight moving distance before and after movement is read, calculates the ship model
(1) practical metacentric height h；
Step 4: obtaining the natural rolling period of the ship model (1) by rolling curve；By curve of declining angle, returns and divide
Analysis obtains roll damping and additional inertial；
Step 5: determine the forced rolling period, by step 4 obtain the ship model (1) the natural rolling period with
Afterwards, as reference, the forced rolling period is set in its vicinity, carries out the forced rolling test of different rolling periods, generally not
It in less than 5 periods, is gone through when measuring roll angle and rolling moment；
Step 6: by the roll angle collected in metacentric height h obtained in step 3 and step 5 and rolling power
It is gone through when square, using polarity check method and Least Square Regression Analysis method, obtains the rolling of ship model by rolling motion equation
Damping and additional inertial, respectively 2N, B and
10. the test method according to claim 9 for ship rolling hydrodynamic measurement, which is characterized in that the cross
Shake the equation of motion are as follows:
Wherein, ship quality m (kg) in formula, D=mg, g are acceleration of gravity, g=9.81m/s2,For forced rolling angular amplitude
(°),It is hull around X-axis inertia (kg.m2),To be surveyed rolling moment amplitude (Nm),For phase difference, linear damping
2N, nonlinear dampling B, △ I φ are hull around X-axis inertia (kg.m2), h is ship model metacentric height (m)；
Formula (b) (c) (d) (e) is brought into equation (a), and integral is taken to formula (a) both sides
XXX is rolling moment, is obtained: By institute's measuring moment when go through and take integralIt obtains.WithFor abscissa,It is sat to be vertical
Mark carries out regression analysis and obtains
Formula (b) (c) (d) (e) is brought into equation (a), and integral is taken to formula (a) both sides
:
For linear term, low-angle and low-frequency forced rolling test are first carried out, B=0, obtains at this time
By surveyed rolling moment when go through and take integral
It obtains.WithFor abscissa,It is vertical
Coordinate, regression analysis obtain 2N；
For nonlinear terms, carries out wide-angle and is tested from low frequency to high-frequency forced rolling, 2N is obtained by above-mentioned, B are as follows:
By institute's measuring moment when go through and take integralIt obtains.
11. the test method according to claim 9 for ship rolling hydrodynamic measurement, which is characterized in that use institute
Method is stated, the forced rolling test under another roll angle is carried out.
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| CN110077521A (en) * | 2019-05-29 | 2019-08-02 | 常石集团（舟山）造船有限公司 | A kind of test device peculiar to vessel |
| CN110525585A (en) * | 2019-09-25 | 2019-12-03 | 哈尔滨工程大学 | A kind of forced rolling stabilizer entity performance testing device |
| CN110579334A (en) * | 2019-09-24 | 2019-12-17 | 中国船舶重工集团公司第七0七研究所 | Mechanical type multipurpose ship model restoring force measuring device and method |
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| CN112093002A (en) * | 2020-09-27 | 2020-12-18 | 中国船舶科学研究中心 | Novel forced rolling test device for water surface model |
| CN113353207A (en) * | 2021-06-03 | 2021-09-07 | 上海海事大学 | Comprehensive sea condition testing device for medical pod equipment of ship |
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