CN102279126B - Method for determining material performance parameter by combination of testing and CAE simulation - Google Patents
Method for determining material performance parameter by combination of testing and CAE simulation Download PDFInfo
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Abstract
A method for determining a material performance parameter by the combination of testing and CAE simulation comprises the following steps: step A, performing modal analysis of a structural part by CAE software to obtain a simulation value of a modal parameter; step B, establishing test boundary conditions consistent with simulation boundary conditions, testing the structural part to obtain a test value of the modal parameter; and step C, comparing the simulation value with the test value to determine whether the material performance parameter meets requirements, wherein if yes, the simulation value is the performance parameter of the structural part, and otherwise, obtaining the performance parameter of the structural part based on simulation optimization. The method of the invention not only can decrease testing cost and increase testing efficiency, but also can control the final material performance of the part.
Description
Technical field
The present invention relates to the method for testing of structural member, particularly relate to the method for testing of the material property parameter of mechanical component.
Background technology
The machining precision of the workpieces such as mechanical component that lathe is used comprises dimensional accuracy and the accuracy of form and position, is the key point that guarantees machine tool capability, and this point is known together by people.Yet the otherness of part material performance is to machine tool capability, and especially the impact of dynamic property is not generally paid attention to by people.
Reality is very large in engineering circles raw-material otherness of the same race, and the otherness of the natural material such as granite and the common metal material that adopts is then especially outstanding: very large change can occur in the metal material of process heat treatment process sometimes performance.For the high-speed mechanism precision machine tool, the otherness of material property also is the key factor that affects machine tool capability.
In order to determine material property parameter, existing a kind of conventional method is that rapidoprint is done conventional detection and check, it need to dispose staff and the multiple instrument and equipment of specialty, with high costs, and be merely able to the performance parameter of controlled working material, can not control the material property of final part.Existing another kind of conventional method is the performance parameter test that the mechanical component that process is carried out entity, owing to needs making exemplar and to damaging property of exemplar, for complex structure, situation that cost is higher, there is equally the high problem of testing cost, and this method of testing, its efficient is also lower.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the deficiencies in the prior art, and proposes a kind of method of definite material property parameter newly, not only can reduce testing cost, improves testing efficiency, and can control the material property of final part.
The technical scheme that the present invention solves the problems of the technologies described above employing comprises, proposes a kind of test and is combined the method for definite material property parameter with the CAE simulation, may further comprise the steps:
Steps A: with CAE software structural member is carried out model analysis, obtain the simulation value of modal parameter;
Step B: set up the test boundary condition consistent with the emulation boundary condition, structural member is tested, obtain the test value of modal parameter; And
Step C: this simulation value and test value are compared, to determine whether material property parameter meets the requirements, and is that then simulation value is the performance parameter of structural member, otherwise obtains the performance parameter of structural member according to simulation optimization.
Model analysis described in the steps A is that a three-dimensional entity model for this structural member carries out; Structural member is tested described in the step B utilizes a three dimensional taest model that this structural member is tested.
This steps A specifically comprises:
In CAE software, make up a three-dimensional entity model;
The simulation value of the modal parameter of this three-dimensional entity model of simulation calculation.
Describedly in CAE software, make up a three-dimensional entity model and specifically comprise:
Set up the three-dimensional entity model of structural member at CAD software;
In this three-dimensional entity model converting input CAE software.
Before the simulation value of the modal parameter of simulation calculation three-dimensional entity model, also comprise, carry out the setting of Modal Analysis step for this three-dimensional entity model, this setting comprises: definition material parameter attribute, establishment entity, defined analysis go on foot, add boundary condition, grid is divided and submit analysis to.
This step B specifically comprises:
Set up a three dimensional taest model of this structural member;
Utilize this three dimensional taest model that this structural member is tested, obtain the test value of modal parameter.
The described process of setting up a three dimensional taest model of this structural member specifically comprises: choose suitable energisation mode and arrange suitable response point at this structural member, according to the shape of this structural member and the response point of layout, in software, set up this three dimensional taest model by the form of input coordinate, probably to depict the profile of this structural member.
The described process of utilizing this three dimensional taest model that this structural member is tested specifically comprises: the position in the test point on this structural member is corresponding with the point on this three dimensional taest model of setting up, and the direction of test is also consistent with this three dimensional taest model direction of coordinate system in software.
Describedly utilize this three dimensional taest model that this structural member is tested specifically to comprise:
Set up the test boundary condition consistent with the emulation boundary condition, the constant excitation point is adopted in firmly hammer excitation, and the method for mobile test point is tested; The content measurement of each test point is excitation and vibration acceleration response, utilizes the method for modal parameter estimation to draw the test value of modal parameter.
The process that this simulation value and test value are compared among the described step C specifically comprises:
Natural frequency and Mode Shape contrast with the structural member of simulate and test.
Compared with prior art, the method of determining material property parameter is combined in test of the present invention with the CAE simulation, obtain the simulation value of modal parameter by software emulation, by structural member being tested the test value that obtains modal parameter, and by two class values being compared to determine material property parameter, not only can reduce testing cost, improve testing efficiency, can also control the material property of final part.
Description of drawings
Fig. 1 is that the principle of work of the method for determining material property parameter is combined in test of the present invention with the CAE simulation.
Fig. 2 is the structure contrast of workpiece and the simplified model thereof of the inventive method embodiment.
Fig. 3 is the flow process signal of the inventive method embodiment.
Fig. 4 is the test of the inventive method embodiment and comparing of simulation architecture.
Embodiment
Below with the base plate (being called the Z axis base plate) of the PCB rig machining shaft example as structural member, the most preferred embodiment shown in by reference to the accompanying drawings is described in further detail.
Test of the present invention as shown in Figure 1 is combined the principle of work of the method for determining material property parameter and is with the CAE simulation: with finite element software the 3D model of structural member is carried out Free Modal Analysis, obtain the simulation value of modal parameter; The entity of structural member is tested and carried out model analysis with vibration measurement instrument, obtain the test value of modal parameter; This simulation value and test value are analyzed.
In order to improve testing efficiency, above-mentioned test is to adopt a three dimensional taest model to assist the test of structural member.Referring to Fig. 2 as can be known, this three dimensional taest model will be simplified much than the structure of structural member.The process of setting up of this three dimensional taest model roughly comprises: at first choose suitable energisation mode and arrange suitable response point at entity, then in software, set up three dimensional taest model by the form of input coordinate according to the shape of entity and the response point that we arrange, probably depict the profile of entity.When adopting the test of this this structural member of three dimensional taest model-aided, the position of test point is corresponding with the point of the three dimensional taest model of setting up on this structural member, the direction of test is also consistent with three dimensional taest model direction of coordinate system in software, after setting up in other words the three dimensional taest model, according to the position of putting on the model and in software the direction of coordinate system, in corresponding point and the direction thereof of this structural member test.
The flow process signal of inventive method embodiment of the present invention, as shown in Figure 3.Roughly comprise:
Choose the structural member of to be analyzed/test, in CAD software Solid works, set up its three-dimensional entity model, its modeling shape is shown in the part drawing that is positioned at the top among Fig. 1, then with the three-dimensional entity model converting input in CAE software Abaqus finite element, in the definition material parameter, definition cross section attribute, analysis step be set, add boundary condition, grid is divided, submit to after analysis, the aftertreatment etc., carry out Free Modal emulation, obtain the Free Modal parameter, namely obtained the simulation value of one group of modal parameter;
Structural member is carried out test modal analysis, for structural member, utilize the Geometry module of the Test.Lab software of LMS company to obtain the design of the three dimensional taest model of structural member, and go out the three dimensional taest model of an entity according to this design construction.Consistent with the emulation boundary condition, to support with flexible suspension, the constant excitation point is adopted in firmly hammer excitation, and the method for mobile test point is tested.Utilize the Impact Testing module of Test.Lab software to carry out the hammering modal test, according to its vibration acceleration response of three dimensional taest model pointwise test of setting up, obtain the frequency response function function of each point by testing tools such as vibration measurement instrument and acceleration transducers.Then, utilize the PolymMAX technology of Modal Analysis module, extract each rank mode, obtain model frequency and Mode Shape.Come test result is carried out the mode modelling verification with Modal Validation module again, guarantee the accuracy of test result;
With test result and simulation result comparative analysis, judge whether material property meets the requirements.
Referring to the listed a kind of test situation of Fig. 4 as can be known, the structural member test is all very similar with Mode Shape to the natural frequency of emulation, difference each other is less, can think the requirement that meets material property, need not carry out simulation optimization, the material property parameter of emulation is the real material parameter of structural member.
Compared with prior art, the method for determining material property parameter is combined in test of the present invention with the CAE simulation, emulation is combined with test, and not only cost is lower, and accomplishes easily the essential laws of the problem that discloses; The method that adopts the mode test to combine with Modal Analysis can accurately be judged the performance difference of part material, mainly comprises: elasticity modulus of materials, Poisson ratio, energy dissipation capability damping value, design of part natural frequency etc.; Have and do not destroy part, do not need to make exemplar, can monitor process problem and the testing efficiency advantages of higher of part itself.
Claims (3)
1. the method for determining material property parameter is combined in a test with the CAE simulation, it is characterized in that, may further comprise the steps:
Steps A: with CAE software structural member is carried out model analysis, obtain the simulation value of modal parameter; Described model analysis is that a three-dimensional entity model for this structural member carries out, be specially: in CAE software, make up a three-dimensional entity model, the simulation value of the modal parameter of this three-dimensional entity model of simulation calculation, before the simulation value of the modal parameter of simulation calculation three-dimensional entity model, also comprise, carry out the setting of Modal Analysis step for this three-dimensional entity model, this setting comprises: definition material parameter attribute, establishment entity, defined analysis go on foot, add boundary condition, grid is divided and submit analysis to;
Step B: set up the test boundary condition consistent with the emulation boundary condition, structural member is tested, obtain the test value of modal parameter; Described structural member is tested utilizes a three dimensional taest model that this structural member is tested, and is specially, and sets up a three dimensional taest model of this structural member; Utilize this three dimensional taest model that this structural member is tested, obtain the test value of modal parameter, the described process of setting up a three dimensional taest model of this structural member specifically comprises: choose suitable energisation mode and arrange suitable response point at this structural member, according to the shape of this structural member and the response point of layout, in Test.Lab software, set up this three dimensional taest model by the form of input coordinate, probably to depict the profile of this structural member; The described process of utilizing this three dimensional taest model that this structural member is tested specifically comprises: the position in the test point on this structural member is corresponding with the point on this three dimensional taest model of setting up, and the direction of test is also consistent with the direction of this three dimensional taest model coordinate system in Test.Lab software; Set up the test boundary condition consistent with the emulation boundary condition, the constant excitation point is adopted in firmly hammer excitation, and the method for mobile test point is tested; The content measurement of each test point is excitation and vibration acceleration response, utilizes the method for modal parameter estimation to draw the test value of modal parameter; And
Step C: this simulation value and test value are compared, to determine whether material property parameter meets the requirements, and is that then simulation value is the performance parameter of structural member, otherwise obtains the performance parameter of structural member according to simulation optimization.
2. the method for claim 1 is characterized in that, describedly makes up a three-dimensional entity model specifically comprise in CAE software:
Set up the three-dimensional entity model of structural member at CAD software;
In this three-dimensional entity model converting input CAE software.
3. such as each described method of claim 1 to 2, it is characterized in that the process that this simulation value and test value are compared among the described step C specifically comprises:
Natural frequency and Mode Shape contrast with the structural member of simulate and test.
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| CN102930099B (en) * | 2012-10-31 | 2015-11-25 | 中国运载火箭技术研究院 | A kind of actual situation mode contrast verification system |
| CN103177165A (en) * | 2013-04-15 | 2013-06-26 | 帝特汽车技术(上海)有限公司 | Coach body structure design system, coach side overturning simulation test system and method |
| CN103278387A (en) * | 2013-06-03 | 2013-09-04 | 哈尔滨工业大学 | Method for measuring parameters of flexible composite material combining finite element software simulation and experiment |
| CN103954494B (en) * | 2014-05-12 | 2016-04-13 | 暨南大学 | A kind of canted coil spring mechanic property test method |
| CN105571796B (en) * | 2014-10-14 | 2018-02-02 | 大族激光科技产业集团股份有限公司 | A kind of mode testing method under micro-element operating mode |
| CN109543306B (en) * | 2018-11-23 | 2023-04-14 | 中创新航技术研究院(江苏)有限公司 | Simulation test-based method for testing welding internal resistance of battery shell cover plate assembly |
| CN112685889B (en) * | 2020-12-24 | 2022-04-29 | 武汉大学 | Simplified test structure design method for detecting system defects |
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| CN101000636A (en) * | 2006-01-11 | 2007-07-18 | 财团法人工业技术研究院 | System for auxiliary designing bicycle fitting and its method |
| CN201071063Y (en) * | 2007-06-29 | 2008-06-11 | 上海华普汽车有限公司 | Front beam of vehicle engine and vehicle |
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Address after: 518020 No. 9 West West Road, Nanshan District hi tech park, Shenzhen, Guangdong Co-patentee after: HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. Patentee after: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. Address before: 518020 No. 9 West West Road, Nanshan District hi tech park, Shenzhen, Guangdong Co-patentee before: HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. Patentee before: Han's Laser Technology Co.,Ltd. |
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Effective date of registration: 20200630 Address after: 518000 workshop 5 / F, 1 / 2 / F, 14 / F, 17 / F, antuoshan hi tech Industrial Park, Xinsha Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 518020 No. 9 West West Road, Nanshan District hi tech park, Shenzhen, Guangdong Co-patentee before: HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. Patentee before: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. |
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Address after: 518000 5 / F, 1 / 2 / F, 14 / F, 17 / F, No.3 Factory building, antuoshan hi tech Industrial Park, Xinsha Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Han's CNC Technology Co.,Ltd. Address before: 518000 5 / F, 1 / 2 / F, 14 / F, 17 / F, No.3 Factory building, antuoshan hi tech Industrial Park, Xinsha Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. |
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