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Real time identification of damages for plate-like structure using migration technique in frequency-wavenumber domain
Author(s): 
Pages: 620-625
Year: Issue:  6
Journal: Journal of Vibration Engineering

Keyword:  结构健康监测频率-波数域偏移板结构多部位损伤实时识别;
Abstract: 借鉴在地球物理学等领域成功应用的偏移技术,提出了一种应用散射Lamb波对板结构中多部位损伤进行实时识别的方法.基于Mindlin板理论,首次推导了板结构中弥散性弯曲波频率-波数域的快速偏移方法.结合爆炸成像原理,采用零炮检距散射波信号对损伤进行成像识别.数值仿真研究表明本文提出方法不仅能够识别多部位损伤的位置,还具有识别损伤程度的潜力,其快速计算的优点满足在线结构健康监测系统对实时性的要求.
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