基于子结构能量的点阵结构损伤诊断方法研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (8) : 12-18.

论文

基于子结构能量的点阵结构损伤诊断方法研究

方辉

作者信息 +

Substructure energy based nondestructive evaluation approach for lattice structures

Fang hui

Author information +

文章历史 +

摘要

提出了二阶子结构能量法以检测点阵结构损伤，称为SOSEM (second order substructure energy method)。对于复杂点阵板，在已知损伤位置条件下，该方法只需结构中存在“缺陷”构件的模态信息，就可以准确地得到构件损伤程度，而传统基于模态分析的方法必需整体结构完全的模态信息，新方法提高了检测效率，对实现快速（实时）点阵结构损伤检测具有重要的应用价值。为了验证本文方法的有效性，以点阵板为例，采用数值方法分析了几种典型损伤情况，结果表明，该方法能够准确地检测出点阵结构中一个或多个单元的损伤。

Abstract

This paper proposes a new method using substructure energy, which is capable of accurately estimating the damage magnitude of multiple members, and particularly advantageous for lattice structures. While other existing damage severity estimation methods require the information of several modes of the whole structure, the new method utilizes only a small number of measurement locations for lattice structures. The performance of the proposed method is compared with existing damage detection methods using a set of numerical simulations that are demonstrated for a lattice panel based on synthetic data generated from finite element models.

导出引用

方辉. 基于子结构能量的点阵结构损伤诊断方法研究[J]. 振动与冲击, 2011, 30(8): 12-18

Fang hui. Substructure energy based nondestructive evaluation approach for lattice structures[J]. Journal of Vibration and Shock, 2011, 30(8): 12-18