基于非线性响应的结构损伤识别响应面方法研究  

Response surface method for damage identification of structures based on nonlinear response

作　　者：徐亚兰[1] 薛敏[1] 

机构地区：[1]西安电子科技大学机电工程学院,西安710071

出　　处：《振动与冲击》2014年第12期117-120,共4页Journal of Vibration and Shock

基　　金：中央高校基本科研业务费专项资金项目(JY10000904012);国防预研基金项目(51421060505DZ0155)

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,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。A new structural nonlinear damage identification technique based on response surface method was presented.Using the structural nonlinear response and its characteristics of power spectrum as damage dynamic indicators,the approximate analytic relationships among nonlinear damage and damage dynamic indicators for structures were obtained with the polynomial response surface method.The simulation results showed that the proposed method can be used to distinguish nonlinear damage from linear damage,and to locate and quantify a nonlinear damage of a structure with a certain accuracy.Its requirement of fewer test samples and higher efficiency of computation demonstrated the potential of the proposed method for nonlinear online damage identification of structures.

关 键 词：响应面方法 非线性损伤识别 功率谱特征值 损伤动力指标 

分 类 号：TU311.3[建筑科学—结构工程]