Dynamic condensation based finite element model correction method

A model correction and finite element technology, applied in the field of finite element model correction based on dynamic polycondensation, can solve the problem of consuming large computing time and resources

Active Publication Date: 2018-03-30
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The calculation and storage of a large number of irrelevant degrees of freedom responses and sensitivities will consume a lot of computing time and resources

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  • Dynamic condensation based finite element model correction method
  • Dynamic condensation based finite element model correction method
  • Dynamic condensation based finite element model correction method

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[0070] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0071] The specific implementation process of the present invention is as follows figure 1 Shown: First, the original finite element model is converted into a polycondensation model by the dynamic polycondensation method, and the response of the finite element model and the sensitivity of the structural design parameters are calculated on the basis of the polycondensation model. Then, the objec...

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Abstract

The invention discloses a dynamic condensation based finite element model correction method. The method includes steps: firstly, reasonably arranging sensors on a testing structure to measure dynamicresponse data of the structure; then, constructing an initial finite element model according to a structural construction drawing, and calculating dynamic response and dynamic response sensitivity ofthe finite element model on the basis of a dynamic condensation method; finally, constructing a target function according to residual errors of measured response and dynamic response obtained by dynamic condensation calculation, and taking the dynamic response sensitivity as a quick optimization direction to repeatedly adjust structural unit correction parameters to minimize the target function, so that structural finite element model correction is realized. The dynamic condensation based finite element model correction method is verified through a simply supported beam model. By the dynamic condensation method, the structural dynamic equation size can be sharply reduced, accuracy and efficiency of the finite element model correction method can be remarkably improved, and high practicalityis realized.

Description

technical field [0001] The invention belongs to the field of health monitoring of civil engineering structures, and more specifically relates to a dynamic polycondensation-based finite element model correction method. Background technique [0002] Finite element models are widely used in the field of structural health monitoring. The actual structural finite element model is usually constructed from structural design drawings and standard specifications. However, the structure is affected by factors such as innate construction differences or environmental erosion, material aging, and natural disasters during later use, which will inevitably cause deviations in its dynamic characteristics from its finite element model. However, in health assessment and damage identification, small deviations between the actual structural dynamic characteristics and the finite element model will lead to misjudgment of damage, which will seriously affect the damage identification results. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/10Y02E60/00
Inventor 翁顺朱宏平夏勇田炜李佳靖陈志丹
Owner HUAZHONG UNIV OF SCI & TECH
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