考虑不确定因素的结构损伤定位方法  

A DAMAGE LOCATION METHOD FOR STRUCTURES WITH UNCERTAINTIES

作　　者：汤凯[1] 刘济科[1] 

机构地区：[1]中山大学应用力学与工程系,广州510275

出　　处：《固体力学学报》2007年第2期189-194,共6页Chinese Journal of Solid Mechanics

基　　金：高等学校博士学科点专项科研基金(20050558032);广东省自然科学基金(05003295);香港中山大学高等学术研究中心基金(06 M8)资助.

摘　　要：将应变模态作为实测资料应用概率方法进行结构损伤定位.采用的模态误差考虑了建模误差和测量误差等不确定因素,避免了测量自由度与模型自由度不匹配的问题.研究了损伤状态搜索策略,并对应变模态和位移模态分别作为实测资料的定位结果进行了比较,表明采用应变模态具有更高的定位精度.A method of damage location for frame structures with uncertainties is presented. By using Bayesian probabilistic method, data acquired from measurement and analysis can all be used to locate damage. Uncertainties derived from model and measurement errors are completely considered by using an out-put mode error. The comparative study between using strain mode shape and normal mode shape as experimental data is made. A six-storey frame structure with multiple damages is taken as an example to verify the proposed method and satisfactory results are observed.

关 键 词：应变模态 概率方法 相对最大后验概率 启发式搜索 

分 类 号：O346.5[理学—固体力学]