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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
结构损伤监测
小波变换
宽带随机激励
structural damage monitoring
wavelet transform
broadband random excitation
