基于关联维数的超声Lamb波损伤成像  

Ultrasonic Lamb Wave Damage Imaging Based on Correlation Dimension

作　　者：刘小峰[1] 夏宇峰 蔡雨洋 

机构地区：[1]重庆大学机械工程学院,重庆400044

出　　处：《压电与声光》2018年第1期115-118,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51475052);中央高校基本科研专项基金资助项目(106112016CDJZR115502)

摘　　要：研究了混沌分形理论的一种特征参数——关联维数的定义计算及参数选择。提出了一种基于关联维数的板状复合材料超声兰姆(Lamb)波损伤检测方法。通过计算采集健康与无损信号的关联维数,对比其数据差异,作为一种损伤指标,用于概率成像算法的损伤位置定位成像。利用有限元分析进行模拟实验研究,结果表明,提出的算法能准确对复合材料脱层缺陷进行定位成像。The correlation dimension is a kind of characteristic parameter of the chaotic system,the definition,parameter selectionand calculation of the correlation dimension was researched in this paper.Anultrasonic Lamb wave damage detection method for the plate composite material based on the correlation dimension was proposed.By calculating the correlation dimensions of collecting the healthy and lossless signals,and comparing the difference between them,the data difference is used as a damage index for the damage location imaging of the probabilistic imaging algorithm.The finite element analysis is used to simulate the experiment,and the experiment investigation shows that the proposed probabilistic algorithm can accurately locate the delamination defects of composite materials.

关 键 词：复合材料 关联维数 兰姆(Lamb)波 概率成像算法 有限元分析 

分 类 号：TM282[一般工业技术—材料科学与工程] TB559[电气工程—电工理论与新技术]