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Aircraft model modification system based on modal test data

A technology of model correction and modal test, applied in the field of virtual test, can solve the problem of no model correction, and achieve the effect of enhancing comprehensiveness and accuracy

Active Publication Date: 2014-02-19
CHINA ACAD OF LAUNCH VEHICLE TECH
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  • Abstract
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Problems solved by technology

[0003] The national invention patent "A Verification System for Virtual and Real Mode Comparison" (patent acceptance number: 201210428672.3) has been accepted to realize the qualitative and quantitative comparison between the modal virtual test results and the physical test results, but there is no model correction function

Method used

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  • Aircraft model modification system based on modal test data
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  • Aircraft model modification system based on modal test data

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Embodiment Construction

[0051] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0052] The invention provides an aircraft model correction system based on modal test data, such as figure 1 As shown, it is used for the mutual comparison between the virtual test and the physical test and the correction of the finite element model, so that the user can check the correctness of the finite element model through the physical test, and correct the finite element model to obtain a more accurate finite element model . The system includes core data structure module, CAE data import module, test data import module, 3D display module, MAC matrix calculation module, 3D MAC matrix display module, finite element model updating and solving module and model correction module.

[0053] In the present invention, the core data structure module mainly includes units, nodes, and result data, etc., and is used to manage the models and ...

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Abstract

An aircraft model modification system based on modal test data comprises a core data structure module, a CAE data import module, a test data import module, a three-dimensional display module, an MAC matrix calculation module, a three-dimensional MAC matrix display module, a finite element model updating solution module and a model modification module. The aircraft model modification system achieves comparison validation and finite element model modification of finite element analysis results and test results, improves model modification efficiency, and enhances comprehensiveness and accuracy of virtual tests.

Description

technical field [0001] The invention relates to an aircraft model correction system based on modal test data, which is suitable for correcting finite element models in the structural design process of aerospace products and belongs to the technical field of virtual tests. Background technique [0002] Generally speaking, the severe vibration and damage caused by large-scale structures under excitation are essentially caused by unreasonable modal parameters. Structural modal analysis can be realized through modal test (physical test) and finite element analysis (virtual test). The modal test is one of the important large-scale ground tests of the spacecraft. Its purpose is to obtain modal parameters such as natural frequency, damping ratio, formation and formation slope for use in the design of the attitude control system. With the development of technologies such as dynamic testing and analysis equipment, modal tests can obtain more accurate modal parameters. However, limi...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F9/455
Inventor 郭爱民王国庆彭健刘维玮许昶章乐平赵雯侯雄
Owner CHINA ACAD OF LAUNCH VEHICLE TECH
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