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基于振动测试与小波包分析的结构损伤预警
引用本文:丁幼亮,李爱群.基于振动测试与小波包分析的结构损伤预警[J].力学学报,2006,38(5):639-644.
作者姓名:丁幼亮  李爱群
作者单位:东南大学土木工程学院
基金项目:国家自然科学基金(50378017)和国家自然科学基金重点项目(50538020)资助.
摘    要:将结构振动测试技术与小波包分析相结合,提出对振动激励信号与响应信号分别 进行小波包分解并在此基础上计算结构的小波包脉冲响应函数及其小波包能量谱,用以表征 结构动力系统的损伤状态. 通过一钢筋混凝土板静力承载力的振动试验分析,计算该板在不 同受力阶段的小波包脉冲响应函数及其小波包能量谱,在此基础上对板不同受力阶段的损伤 状态进行了判别. 该方法克服了结构动力响应的小波包能量谱不能反映结构损伤状态的缺 点,试验表明所采用的方法是可行的.

关 键 词:损伤预警  振动测试  小波分析  小波包分析  小波包能量谱  
文章编号:0459-1879(2006)05-0639-06
收稿时间:2005-11-11
修稿时间:2006-06-04

Combined application of vibration testing and wavelet packet analysis on structural damage alarming
Ding Youliang,Li Aiqun.Combined application of vibration testing and wavelet packet analysis on structural damage alarming[J].chinese journal of theoretical and applied mechanics,2006,38(5):639-644.
Authors:Ding Youliang  Li Aiqun
Affiliation:College of Civil Engineering, Southeast University, Nanjing 210096, China
Abstract:The wavelet packet impulse response function and the wavelet packet energy spectrum of the structural dynamic system are proposed to identify the structural damage status, which is obtained by the wavelet packet decomposition of vibration exciting signals and response signals. Through an analysis of a reinforced concrete slab subjected to a series of static loading, the damage status of the slab during different loading phases is determined using the wavelet packet impulse response functions and the wavelet packet energy spectrum. The proposed method overcomes the shortcoming that the wavelet packet energy spectrum calculated directly from the structural dynamic response does not reflect the structural damage status and the experiment results have confirmed the feasibility of the method.
Keywords:damage alarming  vibration testing  wavelet analysis  wavelet packet analysis  wavelet packet energy spectrum
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