基于对称响应的无基准Lamb波损伤监测  

Baseline Free Lamb Wave Damage Monitoring Based on Symmetric Response

作　　者：王晶[1] 黄三傲 孙加伟 王强 WANG Jing;HUANG San’ao;SUN Jiawei;WANG Qiang(School of Electronic and Information, Nanjing Vocational College of Information Technology, Nanjing 210023,China;CGN Inspection Technology Co., Ltd,Suizhou 215004,China;College of Automation & College of AI, Nanjing University of Posts and Telecommunications, Nanjing 210023,China)

机构地区：[1]南京信息职业技术学院电子信息学院,江苏南京210023 [2]中广核检测技术有限公司,江苏苏州215004 [3]南京邮电大学自动化学院、人工智能学院,江苏南京210023

出　　处：《压电与声光》2021年第1期33-38,共6页Piezoelectrics & Acoustooptics

基　　金：南京信息职业技术学院院级基金重点资助项目(YK20160102);国家重点研发计划基金资助项目(2018YFF01012902)。

摘　　要：兰姆(Lamb)波结构损伤监测是结构健康监测领域的研究热点。针对现有研究和应用中,基于基准响应的损伤监测方法受环境工况等条件的差异性影响问题,在分析Lamb波传播基本过程和损伤作用机理基础上,研究了基于对称响应分析的无基准Lamb波损伤监测方法。该方法通过对称布置压电阵列,实现对称响应信号的获取,进一步借助于皮尔逊相关系数法对对称响应中的有效波包进行对比分析,发现和定位损伤散射信号波包,进而实现损伤监测。在铝板结构上的实验验证表明,该方法可以直接根据当前获得的响应信号,实现对损伤发生情况和位置的判定,无需基准信号对比,这对于实际工程应用具有一定的意义。The Lamb wave based structural damage monitoring is a research hotspot in the field of structural health monitoring.In order to overcome the limitation of the damage monitoring method based on benchmark is affected by the difference of environment and working conditions etc.,a baseline free Lamb wave damage monitoring method based on symmetric response analysis is studied by analyzing the propagation of Lamb wave and the damage mechanism.In this method,the piezoelectric array is arranged symmetrically to obtain symmetrical response signals.Furthermore,the effective wave packets in the symmetrical response are compared and analyzed by Pearson correlation coefficient method,so as to find and locate the damage scattering signal wave packet,and then realize the damage monitoring.The experimental verification on aluminum plate structure shows that the method can directly determine the occurrence and location of damage according to the obtained responses without any benchmark signal comparison,which has certain significance for practical engineering applications.

关 键 词：损伤监测 兰姆(Lamb)波 对称响应 无基准 

分 类 号：TN30[电子电信—物理电子学] TM931[电气工程—电力电子与电力传动]