A time reversal damage imaging method for structure health monitoring using Lamb waves
A time reversal damage imaging method for structure health monitoring using Lamb waves
复制标题
兰姆波结构健康监测的时间反转损伤成像方法
DOI：
10.1088/1674-1056/19/11/114301
复制
发表时间：
2010-11
影响因子：
1.7
通讯作者：
Zhang Hai-Yan
中科院分区：
文献类型：
--
作者：
Yu Jian-Bo;Sun Xiu-Li;Chen Xian-Hua;Cao Ya-Ping;Zhang Hai-Yan
本文研究了结合时间反演的兰姆波成像方法对金属板结构的健康监测。从理论上研究了时间反转兰姆波的时间聚焦效应。它表明聚焦效果与时间反转操作的频率依赖性有关。通过数值模拟来研究兰姆波模式在宽带和窄带激励下的时间反转行为。结果表明，重构的时间反转波与反转窄带突发音信号非常相似，验证了理论模型。为了增强相似性，应增加激发信号的循环数。然后结合有限元模型进行实验，研究板结构中存在孔洞等损伤时的成像方法。在这项工作中，时间反转技术用于兰姆波信号的再压缩。将使用宽带和窄带激励的时间反转的损伤成像结果与没有时间反转的损伤成像结果进行比较。这表明窄带激励联合时间反演可以更精确地定位和确定结构损伤的大小，但应合理选择激励信号的周期数。
This paper investigates the Lamb wave imaging method combining time reversal for health monitoring of a metallic plate structure. The temporal focusing effect of the time reversal Lamb waves is investigated theoretically. It demonstrates that the focusing effect is related to the frequency dependency of the time reversal operation. Numerical simulations are conducted to study the time reversal behaviour of Lamb wave modes under broadband and narrowband excitations. The results show that the reconstructed time reversed wave exhibits close similarity to the reversed narrowband tone burst signal validating the theoretical model. To enhance the similarity, the cycle number of the excited signal should be increased. Experiments combining finite element model are then conducted to study the imaging method in the presence of damage like hole in the plate structure. In this work, the time reversal technique is used for the recompression of Lamb wave signals. Damage imaging results with time reversal using broadband and narrowband excitations are compared to those without time reversal. It suggests that the narrowband excitation combined time reversal can locate and determine the size of structural damage more precisely, but the cycle number of the excited signal should be chosen reasonably.
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影响因子：
2.4
作者：
Park, Hyun Woo;Kim, Seung Bum;Sohn, Hoon
通讯作者：
Sohn, Hoon
影响因子：
4.1
作者：
Betz, DC;Thursby, G;Staszewski, WJ
通讯作者：
Staszewski, WJ
影响因子：
4.2
作者：
Gangadharan, R.;Murthy, C. R. L.;Bhat, M. R.
通讯作者：
Bhat, M. R.
影响因子：
1
作者：
Zhang Rui;Wang Ming-xi;Cao Wen-wu
通讯作者：
Zhang Rui;Wang Ming-xi;Cao Wen-wu
影响因子：
2.4
作者：
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通讯作者：
H. Sohn;Hyun Woo Park;K. Law;C. Farrar