Accurate baseline-free damage localization in plates using refined Lamb wave time-reversal method

被引:48
作者
Kannusamy, M. [1 ,3 ]
Kapuria, S. [1 ,2 ,3 ]
Sasmal, S. [1 ,3 ]
机构
[1] CSIR Struct Engn Res Ctr, Chennai 600113, Tamil Nadu, India
[2] Indian Inst Technol Delhi, Dept Appl Mech, New Delhi 110016, India
[3] AcSIR, Ghaziabad 201002, India
关键词
Lamb wave; time reversal method; structural health monitoring; damage localization; extended wave packet; best reconstruction frequency; sensor network; WAFER ACTIVE SENSORS; COMPOSITE PLATES; TOMOGRAPHY; IDENTIFICATION; TRANSDUCER; EXCITATION; NETWORK;
D O I
10.1088/1361-665X/ab8028
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
In a recent study, Agrahari and Kapuria (J Int Mater Sys Struct, 27, 1283-1305, 2016) presented a Lamb wave based refined time reversal method (RTRM) for baseline-free damage detection in thin plate structures. In this method, it was proposed to conduct the probe at the frequency of best reconstruction and to use an extended wave packet ranging between two side bands accompanying the main mode of the reconstructed signal for computing the damage index. The method showed excellent sensitivity to damage in a single actuator-sensor path scenario. In the present work, the RTRM is integrated with a damage imaging algorithm called the reconstruction algorithm for probabilistic inspection of defects (RAPID) to develop an accurate baseline-free damage localization technique using a network of piezoelectric wafer patch transducers. Its performance is tested experimentally in an aluminium plate with a block mass damage. It is found that the proposed RTRM conducted at the best reconstruction frequency of the sensor network-plate system is able to predict the damage location with very good accuracy, whereas the other existing baseline-free methods such as the conventional TRM with single mode tuning and the reciprocity principle based method are either ineffective in localizing or give highly erroneous prediction of the damage location.
引用
收藏
页数:17
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