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Dynamic response reconstruction method and system based on EMD and model polycondensation, and storage medium

A dynamic response and model technology, applied in special data processing applications, complex mathematical operations, design optimization/simulation, etc., can solve problems such as large amount of calculation and difficult convergence of response reconstruction.

Active Publication Date: 2021-03-16
CENT SOUTH UNIV
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Problems solved by technology

[0004] The present invention provides a method and system for dynamic response reconstruction based on EMD and model polycondensation, and a computer-readable storage medium to solve the problem that the existing dynamic response reconstruction method is difficult to converge and has a large amount of calculation technical problem

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  • Dynamic response reconstruction method and system based on EMD and model polycondensation, and storage medium
  • Dynamic response reconstruction method and system based on EMD and model polycondensation, and storage medium
  • Dynamic response reconstruction method and system based on EMD and model polycondensation, and storage medium

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[0082] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.

[0083] Such as figure 1 As shown, the preferred embodiment of the present invention provides a dynamic response reconstruction method based on Empirical Mode Decomposition (EMD) and model condensation, which is implemented based on three aspects of information: sensor measurement data, structural model parameters, available The position information of measured degrees of freedom and unmeasured degrees of freedom, the response reconstruction method specifically includes the following steps:

[0084] Step S1: Divide the substructure of the finite element model according to the response collection position and the position of the point to be measured;

[0085] Step S2: dividing the degree of freedom of each substructure;

[0086] Step S3: performing modal coordinat...

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Abstract

The invention discloses a dynamic response reconstruction method and system based on EMD and model polycondensation and a computer readable storage medium. According to the method, substructure division is carried out on a finite element model, then degree-of-freedom division is carried out on each substructure, modal coordinate transformation is carried out, each substructure is coupled into a super-unit model, a modal shape matrix of the unit model is solved, and modal response is extracted from measurement data through an EMD decomposition method, and finally a substructure interface response is reconstructed based on the extracted response data and the modal shape matrix. According to the method, the super-element model of the structure is generated based on the finite element model, the current time domain reconstruction method based on EMD decomposition is expanded, the modal synthesis method is used in the response reconstruction method for the first time, response information of key points is predicted through a modal superposition method, the dimensionality of a finite element model related parameter mathematical matrix is effectively reduced, the calculation efficiency ofresponse reconstruction is improved, and the method has the advantages of high accuracy, high analysis speed and the like.

Description

technical field [0001] The present invention relates to the technical field of structural health monitoring, in particular to a dynamic response reconstruction method and system based on EMD (empirical mode decomposition) and model polycondensation, and a computer-readable storage medium. Background technique [0002] With the application of new technologies and materials in civil engineering structures, people have put forward higher requirements for the safety and reliability of civil engineering structures. Therefore, structural health monitoring (SHM) technology has emerged as the times require. Structural health monitoring technology generally combines the data collected by sensors deployed on engineering structures to perform health monitoring and service life evaluation on engineering structures. The main problem that needs to be solved in structural health monitoring is to reasonably monitor the health status of key locations. in the sensor system. However, most eng...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F17/16
CPCG06F30/23G06F17/16
Inventor 邹云峰卢玄东付正亿何旭辉阳劲松
Owner CENT SOUTH UNIV
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