摘要
为研究序贯概率比检验在Lamb波非线性检测中的应用,搭建非线性Lamb波检测系统,该系统用于检测3 mm厚的具有不同疲劳拉伸程度的铝合金板以获取二次谐波信号。将序贯概率比检验用于Lamb波非线性检测中,利用序贯概率比检验算法对收集的3种不同疲劳损伤程度的二次谐波进行分类和识别。结果表明,序贯概率比检验对不同疲劳损伤程度的二次谐波信号能有效分类。
In order to study the application of sequential probability ratio test in the nonlinear detection of Lamb wave,a nonlinear Lamb wave detection system was built,which was used to detect 3 mm thick aluminum alloy plates with different fatigue tensile degrees to obtain second harmonic signals.In this paper,the sequential probabilistic ratio test is applied to the nonlinear detection of Lamb wave.The sequential probabilistic ratio test algorithm is used to classify and identify the collected second harmonics of three different fatigue damage degrees.The results show that the sequential probabilistic ratio test can effectively classify the second harmonic signals with different fatigue damage degrees.
作者
王琪
柯耀
苗育茁
黄浪
陈汉新
WANG Qi;KE Yao;MIAO Yuzhuo;HUANG Lang;CHEN Hanxin(School of Mechanical and Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《噪声与振动控制》
CSCD
北大核心
2021年第5期98-102,共5页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51775390)
湖北省科技厅重大专项资助项目(2016AAA056)
湖北省教育厅重大项目资助(Z20101501)。
关键词
振动与波
序贯概率比检验
非线性检测
Lamb波
vibration and wave
sequential probabilistic ratio test
nonlinear detection
Lamb wave
