宽带随机激励下结构损伤的小波监测  

Wavelet-Based Damage Monitoring of Structures under Broadband Random Excitation

作　　者：董广明[1] 陈进[1] 雷宣扬[1] 宁佐贵[2] 王东升[2] 王雄祥[2] 

机构地区：[1]上海交通大学振动冲击噪声国家重点实验室,上海200240 [2]中国工程物理研究院结构力学研究所,四川绵阳621900

出　　处：《上海交通大学学报》2005年第12期2057-2060,2071,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(10176014)

摘　　要：小波变换已被用于监测结构发生损伤时所引起的响应信号奇异性,但是,当结构受宽带随机激励时,结构响应信号的奇异性也会由激励所引起.研究了分离激励和结构损伤两方面引起的响应信号奇异性的小波变换方法,并将该方法应用于美国土木工程师学会(A SCE)结构健康监测基准的有限元模型分析中.仿真结果表明,该方法是有效的.Wavelet transform has been used for detecting the singularities in structural response, which are caused by sudden changes in the system parameters. If the structure is subject to broadband random excitation like earthquakes, however, the singularities could also be caused by the excitation process. The isolation method based on wavelet transform was investigated to separate the singularities due to the excitation and the singularities due to the structural damages. An FEM model for the American Society of Civil Engineers （ASCE） structural health monitoring benchmark problem was used to demonstrate the validity of the proposed algorithm.

关 键 词：结构损伤监测 小波变换 宽带随机激励 

分 类 号：TP206.3[自动化与计算机技术—检测技术与自动化装置]