CN104318005A - Virtools based multivariate data fusion virtual test display system - Google Patents
Virtools based multivariate data fusion virtual test display system Download PDFInfo
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Abstract
The invention relates to a Virtools based multivariate data fusion virtual test display system, which comprises a data interface and processing module, a hybrid modeling and integrated module, a visual fusion display module, and a model correction module. A finite element method calculation (virtual test) and physical test methods carry out the calculation or test verification on all sub-structures, and a finite element model (virtual test model) is corrected according to physical test result data; meanwhile, a test trend indicated by the virtual test is utilized to guide the physical test to perfect the physical verification test scheme; finally, the overlapping display of comprehensive test environment of a complicated system is carried out according to a hybrid model established by a virtual test model and physical test data, and an LOD management technology is adopted in an overlapping display model, so that the overlapping display efficiency of physical field data in Virtools is improved.
Description
Technical field
The present invention relates to a kind of multivariate data based on Virtools and merge virtual test display system, belong to computer simulation technique field.
Background technology
Along with contemporary large scale structure and labyrinth (as rocket, offshore oil platform, heavy construction, Longspan Bridge etc.) widespread use in engineering, the requirement of structural modeling technology is more and more higher, and meanwhile, difficulty also improves constantly.The maximization of structure determines the inefficiency of structure entirety being carried out to traditional finite element analysis computation, requires to take Substructure Synthesis modeling technique.Meanwhile, because in engineering, some vitals exists great number tested data, these test figures how are effectively utilized to be integrated by the miscellaneous part in itself and system, realize the hybrid modeling of system, set up the kinetic model of system, make its model analysis being applied to system, the Dynamic Response and various coupling analysis.Its work has very much theory value and practical significance.
Virtual Simulation is the effective tool that of growing up in the recent period is widely used in engineering analysis, it can help technician deeply to understand research object physical property (ess-strain, flow velocity, pressure etc. as structure), reproduces various physical features (as structural eigenvector, flow field streamline etc.).Meanwhile, through proper data process, also can be used for the visual of actual loading test data.The system that simultaneously can realize actual situation hybrid modeling and Modifying model does not also see disclosed document.
Summary of the invention
The object of the invention is to the above-mentioned deficiency overcoming prior art, a kind of multivariate data based on Virtools is provided to merge virtual test display system, this display system is the Overlapping display technology in Virtools reality environment mainly for theoretical model in hybrid modeling system and test model, the theoretical model data that hybrid modeling system platform is calculated and virtual test data, Dynamic Announce in Virtools reality environment, simulation object actual conditions, and then reach the optimal design of system schema and properties of product, namely can realize " virtual reality fusion ", the verification experimental verification pattern of " with void indication ", directiveness effect is played to actual design work.
Above-mentioned purpose of the present invention is mainly achieved by following technical solution:
Multivariate data based on Virtools merges a virtual test display system, comprises data-interface and processing module, hybrid modeling and integration module, visual fusion display module, Modifying model module, wherein:
Data-interface and processing module: receive the finite element data of outside input and test figure and store according to the data layout of setting, described finite element data comprises Data of Finite Element Model, finite element modal data and finite element model analysis result data; Described test figure comprises test model data, test frequency response function data and Modal Test result data;
Hybrid modeling and integration module: the finite element data in calling data interface and processing module and test figure, adopt described finite element data to carry out modeling and obtain theoretical model, adopt described test figure to carry out modeling and obtain test model, described theoretical model and test model are carried out comprehensive modeling, obtains hybrid finite element model;
Visual fusion display module: the hybrid finite element model obtained in hybrid modeling and integration module is shown;
Modifying model module: according to modal data and the outside test figure compute mode confidence Criterion Matrix inputted of hybrid finite element model, i.e. MAC matrix, carry out correlation analysis afterwards, if meet degree of confidence requirement, then judge that described hybrid finite element model is reliable model, if do not meet degree of confidence requirement, then described hybrid finite element model is revised, until model meets degree of confidence requirement.
Merge in virtual test display system at the above-mentioned multivariate data based on Virtools, the concrete grammar that hybrid modeling and integration module set up global finite element model is as follows:
(1), by finite element data discretize, obtain finite element node data, finite element unit data, finite element boundary conditions data, Mode Shape data, modal parameter and unit bound data, and described finite element node data, finite element unit data, finite element boundary conditions data, Mode Shape data, modal parameter and unit bound data are stored as the form of setting, namely obtain the modal data of theoretical model, complete the modeling of theoretical model;
(2), by test figure discretize, obtain test node data, wire frame cell data, frequency response function point data and Modal Test data, and described test node data, wire frame cell data, frequency response function point data and Modal Test data are stored as the form of setting, namely obtain the modal data of test model, complete the modeling of test model; Described step (1) is same format with the form set described in step (2);
(3), the modal data of the test model in the modal data of theoretical model in step (1) and step (2) is all converted into frequency response function, and the frequency response function of the frequency response function of theoretical model and test model is carried out comprehensively, obtain the frequency response function of hybrid finite element model, again the frequency response function of described hybrid finite element model is carried out modal idenlification, obtain hybrid finite element model modal data, complete the modeling of hybrid finite element model.
Merge in virtual test display system at the above-mentioned multivariate data based on Virtools, in step (3), the modal data of theoretical model and the modal data of test model are converted into frequency response function H
ijconcrete grammar as follows:
By modal data
by following formulae discovery obtain intermediate response amount X}:
Wherein: N is total mode number, and j is number of degrees of freedom,
for the r rank mode of structure, k
rbe r rank modal stiffness, ξ
rbe r rank modal damping, Ω
rbe r rank natural frequency, w is point of excitation displacement; F is exciting force; For writing conveniently, make λ
r=w/ Ω
r; Assuming that only have exciting force F in the j point effect of structure
j, so:
F＝{0?0...F
j?0...0}
T
In formula,
for
a jth element of vector, the response X at any point i place
ito be:
In formula,
for
i-th element of vector, so can obtain:
H
ijbe i, the frequency response function between j, represent when j point function unit power, in the response caused by i point.
Merge in virtual test display system at the above-mentioned multivariate data based on Virtools, fixed-interface methods method or Free-Interface Method for Mode Synthesis is adopted to be undertaken comprehensively by the frequency response function of the frequency response function of theoretical model and test model in step (3), obtain the frequency response function of mixture model, again described mixture model frequency response function is carried out modal idenlification by polynomial fitting method (Levy) method, obtain mixture model modal data, complete the modeling of hybrid finite element model.
Merge in virtual test display system at the above-mentioned multivariate data based on Virtools, the test figure compute mode confidence Criterion Matrix corresponding with hybrid finite element model that Modifying model module inputs with outside according to the modal data of hybrid finite element model, i.e. MAC matrix, carry out correlation analysis afterwards, if meet degree of confidence requirement, then judge that described hybrid finite element model is reliable model, if do not meet degree of confidence requirement, then described hybrid finite element model is revised, until the specific implementation process that model meets degree of confidence requirement is as follows:
(1) method of vibration shape coupling, is adopted to calculate the correlativity of each rank mode between each rank mode of hybrid finite element model and actual loading test result according to the modal data of hybrid finite element model and the outside modal test data inputted, obtain modal assurance criterion MAC matrix, the behavior test vibration shape of described MAC matrix, is classified as the theoretical vibration shape;
(2) MAC matrix the 1st row maximal value { MAC, is extracted
max}
1and described maximal value { MAC
max}
1the position i1 of the row in the 1st row, then namely i1 is the finite element modal exponent number mated with the first rank Modal Test, obtains first group of coupling right: { 1, i1} extracts MAC matrix the 2nd row maximal value { MAC
max}
2and described maximal value { MAC
max}
2the position i2 of the row in the 2nd row, then namely i2 is the finite element modal exponent number mated with second-order Modal Test, obtains second group of coupling right: 2, i2} ..., the like, obtain n-th group of coupling right: n, in}, described n is total columns of MAC matrix;
(3), judge that described n group coupling is to { 1, i1} ... { n { the MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
nwhether meet degree of confidence requirement, namely whether reach the degree of confidence of setting, if meet degree of confidence requirement, then judge that described global finite element model is reliable model, otherwise enter step (4);
(4), change the initial parameter of global finite element model, again obtain n group and mate { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
n, return step (3), until n group coupling is to { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
nmeet degree of confidence requirement.
Merge in virtual test display system at the above-mentioned multivariate data based on Virtools, the global finite element model obtained in hybrid modeling and integration module is shown by LOD administrative skill by visual fusion display module.
The present invention compared with prior art has following beneficial effect:
(1), display system of the present invention is by data-interface and processing module, hybrid modeling and integration module, visual fusion display module and Modifying model module composition, adopt hybrid modeling method, test model and finite element model being carried out comprehensive modeling, by contrasting with test figure, theoretical model being revised, obtain reliable global finite element model, be used to guide and optimize actual tests process;
(2), the present invention is based on virtual simulation environment, the theoretical model of finite element analysis (virtual test model) and actual loading test models coupling are got up, get final product " virtual reality fusion " on real concept, the test trend utilizing virtual test to indicate instructs actual loading test, improve physical varification testing program, the compbined test that last basis carries out complication system by the mixture model of virtual test model and actual loading test data construct is verified, and then reach the optimal design of system schema and properties of product, namely can realize " virtual reality fusion ", the verification experimental verification pattern of " with void indication ",
(3), the present invention adopt multivariate data display packing, be better than the existing multiple physical field visualization system based on virtual reality environments merely, Overlapping display process can be carried out to the material object of multivariate data and virtual test environment;
(4), in the present invention Overlapping display module can adopt LOD administrative skill, significantly improves the efficiency of physical field data investigation display in Virtools; Adopt the methods such as vibration shape coupling and correlation analysis in Modifying model module, substantially increase the reliability of comprehensive modeling;
(5), the present invention is by hybrid modeling theoretical research and hybrid modeling environment exploitation, the hybrid modeling of finite element virtual test and the display packing based on Virtools are merged mutually, build the compbined test modeling tools platform of hybrid modeling, the compbined test realized based on mixture model is verified;
(6), the present invention is directed to model hybrid modeling and the Model Updating Technique of virtual, reality test, can implementation model to the correction of simulation test environment, break through unicity function to virtual environment display.
Accompanying drawing explanation
Fig. 1 is that multivariate data of the present invention merges display system architectures figure;
Fig. 2 is that multivariate data of the present invention merges display system principle of work schematic diagram;
Fig. 3 is that multivariate data of the present invention merges hybrid modeling and integration module process chart in display system;
Fig. 4 is that multivariate data of the present invention merges in display system based on Virtools reality environment Overlapping display LOD algorithm flow chart;
Fig. 5 is that multivariate data of the present invention merges Modifying model module work schematic diagram in display system.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Be illustrated in figure 1 virtual test display system architectures figure of the present invention, multivariate data of the present invention merges virtual test display system as seen from the figure, comprises data-interface and processing module, hybrid modeling and integration module, visual fusion display module and Modifying model module.
Be illustrated in figure 2 virtual test display system principle of work schematic diagram of the present invention, receive the finite element data of outside input and test figure by data-interface and processing module and store according to the data layout of setting, finite element data in hybrid modeling and integration module calling data interface and processing module and test figure, theorize model and test model, described theoretical model and test model are carried out comprehensive modeling, obtain global finite element model, described model is shown at visual fusion display module, in Modifying model module, according to modal data and the outside test figure compute mode confidence Criterion Matrix inputted of hybrid finite element model, i.e. MAC matrix, carry out correlation analysis afterwards, if meet degree of confidence requirement, then judge that described hybrid finite element model is reliable model, if do not meet degree of confidence requirement, then described hybrid finite element model is revised, until model meets degree of confidence requirement.
Be illustrated in figure 3 hybrid modeling and integration module process chart in virtual test display system of the present invention, finite element data in hybrid modeling and integration module calling data interface and processing module and test figure, adopt described finite element data to carry out modeling and obtain theoretical model, adopt described test figure to carry out modeling and obtain test model, described theoretical model and test model are carried out comprehensive modeling, obtains hybrid finite element model.
The concrete methods of realizing that hybrid modeling and integration module set up global finite element model is as follows:
(1), by finite element data discretize, obtain finite element node data, finite element unit data, finite element boundary conditions data, Mode Shape data, modal parameter and unit bound data, and described finite element node data, finite element unit data, finite element boundary conditions data, Mode Shape data, modal parameter and unit bound data are stored as the form of setting, namely obtain the modal data of theoretical model, complete the modeling of theoretical model;
(2), by test figure discretize, obtain test node data, wire frame cell data, frequency response function point data and Modal Test data, and described test node data, wire frame cell data, frequency response function point data and Modal Test data are stored as the form of setting, namely obtain the modal data of test model, complete the modeling of test model; Described step (1) is same format with the form set described in step (2);
(3), the modal data of the test model in the modal data of theoretical model in step (1) and step (2) is all converted into frequency response function, and adopt fixed-interface methods method or Free-Interface Method for Mode Synthesis to carry out comprehensively the frequency response function of the frequency response function of theoretical model and test model, obtain the frequency response function of hybrid finite element model, again the frequency response function of hybrid finite element model is carried out modal idenlification by polynomial fitting method (Levy) method, obtain hybrid finite element model modal data, complete the modeling of hybrid finite element model.
The method wherein modal data of theoretical model being converted into frequency response function is identical with the method modal data of test model being converted into frequency response function, is converted into frequency response function H
ijconcrete grammar as follows:
By modal data
by following formulae discovery obtain intermediate response amount X}:
Wherein: N is total mode number, and j is number of degrees of freedom,
for the r rank mode of structure, k
rbe r rank modal stiffness, ξ
rbe r rank modal damping, Ω
rbe r rank natural frequency, w is point of excitation displacement; F is exciting force; For writing conveniently, make λ
r=w/ Ω
r; Assuming that only have exciting force F in the j point effect of structure
j, so:
F＝{0?0...F
j?0...0}
T
In formula,
for
a jth element of vector, the response X at any point i place
ito be:
In formula,
for
i-th element of vector, so can obtain:
H
ijbe i, the frequency response function between j, represent when j point function unit power, in the response caused by i point.
The global finite element model obtained in hybrid modeling and integration module shows by visual fusion display module.Visual fusion display module can be shown by LOD administrative skill, is simplified by network model, realizes the Overlapping display based on Virtools reality environment.
Early stage based in Virtools reality environment Overlapping display system, because large-sized model data volume is large, to the storage of figure, draw and play up and bring very large difficulty, display efficiency is not high in actual use, have impact on the intuitive of data investigation display, real-time.Therefore in order to save system resource, accelerate the processing speed of model, can in Virtools reality environment Overlapping display LOD administrative skill.
Be illustrated in figure 4 based on Virtools reality environment Overlapping display LOD algorithm flow chart in present system, the basic procedure of LOD algorithm is Step1: read in grid model TM, if grid is not all triangle, by grid conversion triangularity grid; Step2: travel through each vertex v
i, calculate with v
ifor the collapse cost on all limits of starting point, get the minimum limit of collapse cost as with v
ifor the folded edge of starting point; Step3: Stochastic choice d candidate's folded edge, takes out the limit e that in d candidate's folded edge, collapse cost is minimum
i, judge e
ilegitimacy; If carry out edge contraction legal and perform Step5, non-rule performs Step4; Step4: collapse cost adds a threshold values C, judges whether to be greater than the cost upper limit; If perform Step7, otherwise perform Step3; Step5: upgrade with the collapse cost on the limit that is starting point, new summit; Step6: repeated execution of steps Step3, until the list of folded edge is empty; Step7: require to draw grid model according to user, terminate.
In visual fusion display module, use LOD algorithm, apply the LOD display management technology based on viewpoint; Data processing and display efficiency are efficient, guarantee that general scale model reaches 24 frames/more than second in Virtools.Have in module and whether open and use the setting of LOD administrative skill, be convenient to minimodel display; Whether module has and adopts LOD display mode to arrange, and manually can arrange simplifying rate, improves Overlapping display efficiency.
Be illustrated in figure 5 Modifying model module work schematic diagram in virtual test display system of the present invention.Modifying model module: according to modal data and the outside test figure compute mode confidence Criterion Matrix inputted of hybrid finite element model, i.e. MAC matrix, carry out correlation analysis afterwards, if meet degree of confidence requirement, then judge that described hybrid finite element model is reliable model, if do not meet degree of confidence requirement, then described hybrid finite element model is revised, until model meets degree of confidence requirement, obtain reliable global finite element model, be used to guide and optimize actual tests process.
Modifying model module adopts the model modification method based on modal parameter sensitivity analysis, and concrete implementation procedure is as follows:
Step (one), the method adopting the vibration shape to mate calculate the correlativity of each rank mode between each rank mode of finite element model and actual loading test result according to the modal data of global finite element model and the outside modal test data inputted, obtain modal assurance criterion MAC matrix, the behavior test vibration shape of described MAC matrix, is classified as the theoretical vibration shape;
Step (two), extraction MAC matrix the 1st row maximal value { MAC
max}
1and described maximal value { MAC
max}
1the position i1 of the row in the 1st row, then namely i1 is the finite element modal exponent number mated with the first rank Modal Test, obtains first group of coupling right: { 1, i1} extracts MAC matrix the 2nd row maximal value { MAC
max}
2and described maximal value { MAC
max}
2the position i2 of the row in the 2nd row, then namely i2 is the finite element modal exponent number mated with second-order Modal Test, obtains second group of coupling right: 2, i2} ..., the like, obtain n-th group of coupling right: n, in}, described n is total columns of MAC matrix;
Step (three), judge described n group coupling to { 1, i1} ... { n { the MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
nwhether meet degree of confidence requirement, namely whether reach the degree of confidence of setting, if meet degree of confidence requirement, then judge that described global finite element model is reliable model, otherwise enter step (4);
The initial parameter of step (four), change global finite element model, obtains n group coupling again to { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
n, return step (3), until n group coupling is to { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
nmeet degree of confidence requirement.
After the initial parameter of above-mentioned change global finite element model, again more newly-established theoretical model in hybrid modeling and integration module, theoretical model after renewal and test model are carried out comprehensive modeling, all frequency response function is converted into by the modal data of theoretical model after renewal and the modal data of test model, and adopt fixed-interface methods method or Free-Interface Method for Mode Synthesis to carry out comprehensively the frequency response function of theoretical model after renewal and the frequency response function of test model, obtain the frequency response function of hybrid finite element model, again the frequency response function of hybrid finite element model is carried out modal idenlification by polynomial fitting method (Levy) method, obtain hybrid finite element model modal data.Again the modal data of hybrid finite element model is substituted in above-mentioned steps (), step (two) afterwards, again obtain n group coupling to { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
n.
The present invention adopts the mode of FEM (finite element) calculation (virtual test) and actual loading test to carry out respectively calculating or verification experimental verification, according to actual loading test result data correction finite element model (virtual test model), simultaneously, the test trend utilizing virtual test to indicate instructs actual loading test, improve physical varification testing program, the compbined test that last basis carries out complication system by the mixture model of virtual test model and actual loading test data construct is verified, and then reach the optimal design of system schema and properties of product, both can realize " virtual reality fusion ", the verification experimental verification pattern of " with void indication ".
The above; be only the embodiment of the best of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
The content be not described in detail in instructions of the present invention belongs to the known technology of professional and technical personnel in the field.
Claims (6)
1. the multivariate data based on Virtools merges a virtual test display system, it is characterized in that: comprise data-interface and processing module, hybrid modeling and integration module, visual fusion display module, Modifying model module, wherein:
Data-interface and processing module: receive the finite element data of outside input and test figure and store according to the data layout of setting, described finite element data comprises Data of Finite Element Model, finite element modal data and finite element model analysis result data; Described test figure comprises test model data, test frequency response function data and Modal Test result data;
Hybrid modeling and integration module: the finite element data in calling data interface and processing module and test figure, adopt described finite element data to carry out modeling and obtain theoretical model, adopt described test figure to carry out modeling and obtain test model, described theoretical model and test model are carried out comprehensive modeling, obtains hybrid finite element model;
Visual fusion display module: the hybrid finite element model obtained in hybrid modeling and integration module is shown;
Modifying model module: according to modal data and the outside test figure compute mode confidence Criterion Matrix inputted of hybrid finite element model, i.e. MAC matrix, carry out correlation analysis afterwards, if meet degree of confidence requirement, then judge that described hybrid finite element model is reliable model, if do not meet degree of confidence requirement, then described hybrid finite element model is revised, until model meets degree of confidence requirement.
2. a kind of multivariate data based on Virtools according to claim 1 merges virtual test display system, it is characterized in that: the concrete grammar that described hybrid modeling and integration module set up global finite element model is as follows:
(1), by finite element data discretize, obtain finite element node data, finite element unit data, finite element boundary conditions data, Mode Shape data, modal parameter and unit bound data, and described finite element node data, finite element unit data, finite element boundary conditions data, Mode Shape data, modal parameter and unit bound data are stored as the form of setting, namely obtain the modal data of theoretical model, complete the modeling of theoretical model;
(2), by test figure discretize, obtain test node data, wire frame cell data, frequency response function point data and Modal Test data, and described test node data, wire frame cell data, frequency response function point data and Modal Test data are stored as the form of setting, namely obtain the modal data of test model, complete the modeling of test model; Described step (1) is same format with the form set described in step (2);
(3), the modal data of the test model in the modal data of theoretical model in step (1) and step (2) is all converted into frequency response function, and the frequency response function of the frequency response function of theoretical model and test model is carried out comprehensively, obtain the frequency response function of hybrid finite element model, again the frequency response function of described hybrid finite element model is carried out modal idenlification, obtain hybrid finite element model modal data, complete the modeling of hybrid finite element model.
3. a kind of multivariate data based on Virtools according to claim 2 merges virtual test display system, it is characterized in that: in described step (3), the modal data of theoretical model and the modal data of test model are converted into frequency response function H
ijconcrete grammar as follows:
By modal data
by following formulae discovery obtain intermediate response amount X}:
Wherein: N is total mode number, and j is number of degrees of freedom,
for the r rank mode of structure, k
rbe r rank modal stiffness, ξ
rbe r rank modal damping, Ω
rbe r rank natural frequency, w is point of excitation displacement; F is exciting force; For writing conveniently, make λ
r=w/ Ω
r; Assuming that only have exciting force F in the j point effect of structure
j, so:
F＝{0?0?...?F
j?0?...?0}
T
In formula,
for
a jth element of vector, the response X at any point i place
ito be:
In formula,
for
i-th element of vector, so can obtain:
H
ijbe i, the frequency response function between j, represent when j point function unit power, in the response caused by i point.
4. a kind of multivariate data based on Virtools according to claim 2 merges virtual test display system, it is characterized in that: in described step (3), adopt fixed-interface methods method or Free-Interface Method for Mode Synthesis to be undertaken comprehensively by the frequency response function of the frequency response function of theoretical model and test model, obtain the frequency response function of mixture model, again described mixture model frequency response function is carried out modal idenlification by polynomial fitting method (Levy) method, obtain mixture model modal data, complete the modeling of hybrid finite element model.
5. a kind of multivariate data based on Virtools according to claim 1 merges virtual test display system, it is characterized in that: the test figure compute mode confidence Criterion Matrix corresponding with hybrid finite element model that described Modifying model module inputs with outside according to the modal data of hybrid finite element model, i.e. MAC matrix, carry out correlation analysis afterwards, if meet degree of confidence requirement, then judge that described hybrid finite element model is reliable model, if do not meet degree of confidence requirement, then described hybrid finite element model is revised, until the specific implementation process that model meets degree of confidence requirement is as follows:
(1) method of vibration shape coupling, is adopted to calculate the correlativity of each rank mode between each rank mode of hybrid finite element model and actual loading test result according to the modal data of hybrid finite element model and the outside modal test data inputted, obtain modal assurance criterion MAC matrix, the behavior test vibration shape of described MAC matrix, is classified as the theoretical vibration shape;
(2) MAC matrix the 1st row maximal value { MAC, is extracted
max}
1and described maximal value { MAC
max}
1the position i1 of the row in the 1st row, then namely i1 is the finite element modal exponent number mated with the first rank Modal Test, obtains first group of coupling right: { 1, i1} extracts MAC matrix the 2nd row maximal value { MAC
max}
2and described maximal value { MAC
max}
2the position i2 of the row in the 2nd row, then namely i2 is the finite element modal exponent number mated with second-order Modal Test, obtains second group of coupling right: 2, i2} ..., the like, obtain n-th group of coupling right: n, in}, described n is total columns of MAC matrix;
(3), judge that described n group coupling is to { 1, i1} ... { n { the MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
nwhether meet degree of confidence requirement, namely whether reach the degree of confidence of setting, if meet degree of confidence requirement, then judge that described global finite element model is reliable model, otherwise enter step (4);
(4), change the initial parameter of global finite element model, again obtain n group and mate { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
n, return step (3), until n group coupling is to { 1, i1} ... { n the maximal value { MAC that n, in} are corresponding
max}
1maximal value { MAC
max}
nmeet degree of confidence requirement.
6. a kind of multivariate data based on Virtools according to claim 1 merges virtual test display system, it is characterized in that: the global finite element model obtained in hybrid modeling and integration module is shown by LOD administrative skill by described visual fusion display module.
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| CN109491266A (en) * | 2018-11-28 | 2019-03-19 | 北京宇航***工程研究所 | A kind of Launch vehicle flight simulation method based on more body virtual prototypes |
| CN109491266B (en) * | 2018-11-28 | 2022-04-12 | 北京宇航***工程研究所 | Carrier rocket flight simulation method based on multi-body virtual prototype |
| CN110081928A (en) * | 2019-04-08 | 2019-08-02 | 北京强度环境研究所 | A kind of condition monitoring system of oil gas bearing experimental rig |
| CN110081928B (en) * | 2019-04-08 | 2021-09-03 | 北京强度环境研究所 | State monitoring system of oil-gas bearing test device |
| CN110222428A (en) * | 2019-06-10 | 2019-09-10 | 哈尔滨工程大学 | A kind of reliability analysis system and method for system-oriented grade encapsulation SIP device |
| CN113378265A (en) * | 2021-05-31 | 2021-09-10 | 中铁二院工程集团有限责任公司 | Bridge dynamic performance evaluation method based on multi-body dynamics |
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