一种确定锚杆系统损伤位置的小波分析方法  

A wavelet method to fix the defect position of anchorage system

作　　者：陈建功[1] 张永兴[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《煤炭学报》2008年第4期391-394,共4页Journal of China Coal Society

基　　金：国家杰出青年科学基金资助项目(5062824);重庆市科技攻关计划资助项目(CSTC;2006AB7003)

摘　　要：提出一种利用小波分析诊断锚杆系统损伤位置的方法.小波变换的模极大值均出现在信号有突变的地方,且突变点处的高频成分较多,突变点就可从其小波变换的高频部分的模极大值检测出来.在实验室制作了锚杆模型,并进行了低应变动力测试,对动测信号进行小波分析,提取突变点,所得到的损伤位置与实际模型情况一致.A method to fix the defect position of anchorage system by wavelet analysis present was proposed. A modulus maximum by wavelet transfer as the signal is mutant and the mutant signal contains much more high frequency components. Thus, the mutant point can be detected by determining the modulus maximum points in high frequency components of wavelet transfer. The simplified models of anchorage system with different damage conditions were made in laboratory and the corresponding dynamic response curves were acquired. Through wavelet analysis of dynamic signal, the mutant points were identified, the defect positions are conformity with the models.

关 键 词：锚杆 损伤 小波分析 模极大值 

分 类 号：TD353[矿业工程—矿井建设]