基于随机振动响应互相关函数的结构损伤识别试验分析  

Structural damage detection method based on correlation function analysis of vibration measurement data

作　　者：雷家艳[1,2] 姚谦峰[1] 雷鹰[2] 刘朝[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]厦门大学建筑与土木工程学院,福建厦门361005

出　　处：《振动与冲击》2011年第8期221-224,236,共5页Journal of Vibration and Shock

基　　金：国家科技部863项目(2007AA04Z420)

摘　　要：提出了基于结构振动响应互相关函数分析的损伤识别方法。通过八层剪切型钢框架结构模型在模拟白噪声随机激励作用下的试验,利用相邻测点响应的互相关函数幅值向量变化,构造损伤识别因子进行结构损伤判定、定位及程度量化,结果表明该方法对结构损伤识别的简易性及有效性,并为结构在线监测和分散式检测提供方法参考。A structural damage identification measurement data was proposed. An 8-storey steel shear technique based on correlation function analysis of vibration building model was chosen as example in the case verification. The results demonstrate that accident magnitude change of correlation function can be used to locate the damage by comparing the shape changes between damaged and undamaged samples. The value of CVAC is effective to determinate whether the damage has happened or not, and it can be used as a reference method even for on-line structural health monitoring. The parameter K, defined to detect damage severity, corresponds to the theoretical damage level in different cases.

关 键 词：损伤识别 互相关函数 随机振动 振动试验 

分 类 号：TU317.1[建筑科学—结构工程]