基于曲率模态和小波变换的结构损伤识别方法  

Structural Damages Identification Based on Curvature Mode and Wavelet Transform

作　　者：孙增寿[1] 韩建刚[1] 任伟新[1] 

机构地区：[1]福州大学土木建筑工程学院

出　　处：《振动．测试与诊断》2005年第4期263-267,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：教育部留学归国人员基金资助项目。

摘　　要：在结构曲率模态基础上,提出了一种基于小波变换的结构损伤检测和定位方法。利用双正交小波函数对损伤前后结构的曲率模态进行小波变换,通过损伤前后小波变换系数的变化和分布情况建立了结构损伤指标,可判定损伤存在,确定损伤位置和估计损伤程度,并通过一两端简支梁的数值模拟对该方法进行了验证。Based on curvature mode and wavelet transform,this paper presents a recognition method for structural damages.The structural curvature mode curves before and after damage are transformed in biorthogonal wavelets.The structural damage index is given out with the change and distribution of wavelet transform coefficients before and after damage.The structural damage index can be used to determine the existence,location and degree of the damage.And the method is verified with the numerical simulation in a simple supported beam.The simulation results show that the method is effective.

关 键 词：小波变换 曲率模态 损伤识别 损伤定位 

分 类 号：TN911.6[电子电信—通信与信息系统] TH165.3[电子电信—信息与通信工程]