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A Mixed Finite-Complex-Difference Sensitivity Analysis Method for Multi-parameter Structure Dynamic Response

A finite difference, dynamic response technology, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve the problems of low analysis efficiency, increase the time-consuming of reanalysis calculations, and achieve the effect of improving analysis efficiency.

Active Publication Date: 2020-03-31
SOUTHEAST UNIV
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Problems solved by technology

However, for multi-parameter structural dynamic response sensitivity analysis, it is necessary to perturb each parameter, which increases the calculation time of re-analysis, and the analysis efficiency is low.

Method used

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  • A Mixed Finite-Complex-Difference Sensitivity Analysis Method for Multi-parameter Structure Dynamic Response
  • A Mixed Finite-Complex-Difference Sensitivity Analysis Method for Multi-parameter Structure Dynamic Response
  • A Mixed Finite-Complex-Difference Sensitivity Analysis Method for Multi-parameter Structure Dynamic Response

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Embodiment Construction

[0039] Such as figure 1 As shown, a mixed finite-complex variable difference multi-parameter structural dynamic response sensitivity analysis method includes the following steps:

[0040] (1) For example figure 1 The shown structure is modeled by finite element, and the dynamic control equation of the structure is obtained, and the dynamic response of the structure before parameter perturbation is obtained by solving the equation;

[0041] (2) According to the structural dynamics optimization requirements, the real part perturbation and the imaginary part perturbation are respectively constructed for different optimization parameters, and then the perturbed parameters are brought into the structural dynamics control equation to solve the dynamic response;

[0042] (3) Extract the real and imaginary parts of the perturbed structural dynamic response data, and calculate the time-history curves of structural dynamic response sensitivity for the corresponding parameters.

[0043...

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Abstract

The present invention provides a multi-parameter structure dynamic response sensitivity analysis method using finite-complex differences. For the optimization design of structural dynamics with multi-parameters, the design parameters are extended from real number field to complex number field; by carrying out real-part perturbation and imaginary-part perturbation on two different design parametersrespectively, kinetic analysis is performed on the structure, the real and imaginary responses of the structure are extracted from the dynamic analysis results, and the sensitivity of the two designparameters is obtained. The multi-parameter sensitivity analysis of the structural dynamic response is realized. The invention provides a fast and effective method for the engineering application of the multi-parameter sensitivity analysis of the structural dynamic response.

Description

technical field [0001] The invention belongs to the field of dynamic optimization design of structures, and in particular relates to a mixed finite-complex variable difference multi-parameter structure dynamic response sensitivity analysis method. Background technique [0002] The dynamic response sensitivity analysis of structural parameters is an important link in the structural dynamic optimization design based on gradient analysis, which characterizes the degree and law of the influence of structural design parameters on the output response. The output response of the structure can be used to construct the optimization target, and the structural dynamics optimization design can be realized according to the sensitivity analysis results of the dynamic response of the structure. [0003] Existing methods can be divided into theoretical analytical method, finite difference method, complex variable difference method and semi-analytic method. Among them, the finite difference...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/06
Inventor 费庆国曹芝腑姜东朱锐杭晓晨陈素芳
Owner SOUTHEAST UNIV