基于非线性响应的结构损伤识别响应面方法研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 117-120.

论文

基于非线性响应的结构损伤识别响应面方法研究

徐亚兰薛敏

作者信息 +

Application of Response Surface Method on Damage identification of Structures Based on Nonlinear Response

Xu Ya-Lan Xue Min

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文章历史 +

摘要

基于结构非线性响应信号，提出以结构响应信号的功率谱特征值为损伤动力指标，利用多项式响应面方法建立结构损伤与损伤动力指标之间的近似解析表达式，实现利用响应面方法对结构非线性损伤进行识别。结果表明，本文所提出的损伤动力指标及损伤识别的响应面方法可以对结构的线性损伤与非线性损伤进行区分，对结构的非线性损伤有很好的定位和定量精度，而且其所需试验样本点少，计算效率高，显示响应面方法在结构实时非线性损伤识别中的应用潜力。

Abstract

A new structural nonlinear damage identification technique based on response surface method is presented. Using the structural nonlinear response and its characteristics of power spectrum as damage dynamic indicators, the approximate analytic relationships between nonlinear damage and damage dynamic indicators for structures have been obtained by the polynomial response surface method. The simulation results show that the presented method can distinguish nonlinear damage from linear damage, and locate and quantify the nonlinear damage of the structure with some degree of accuracy. The demand in little information and the efficiency of computation demonstrates the potential of the presented method for nonlinear online damage identification of structures.

导出引用

徐亚兰薛敏 . 基于非线性响应的结构损伤识别响应面方法研究[J]. 振动与冲击, 2014, 33(12): 117-120

Xu Ya-Lan Xue Min . Application of Response Surface Method on Damage identification of Structures Based on Nonlinear Response[J]. Journal of Vibration and Shock, 2014, 33(12): 117-120