文献类型：期刊文献

英文题名：Generation of cumulative second-harmonic ultrasonic guided waves with group velocity mismatching: Numerical analysis and experimental validation

作者：Xiang, Yanxun[1];Zhu, Wujun[1];Deng, Mingxi[2];Xuan, Fu-Zhen[1];Liu, Chang-Jun[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China;[2]Logist Engn Univ, Dept Phys, Chongqing 400016, Peoples R China

年份：2016

卷号：116

期号：3

外文期刊名：EPL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000392953800013)】；

基金：This work was supported by the National Key Research and Development Program of China (2016YFC0801903), National Natural Science Foundation of China (Grant Nos. 51325504, 11474093, 11474361 and 11622430), and the Fundamental Research Funds for the Central Universities.

语种：英文

摘要：The generation of second-harmonic Lamb waves in a homogeneous, isotropic, stressfree elastic plate is analytically and experimentally investigated. The numerical analyses show that whether the matching condition of the group velocity is satisfied or not, the integrated amplitude of a second-harmonic Lamb wave accumulates with the propagation distance when both the finite duration of the primary Lamb wave tone burst and the phase velocity matching are given. The theoretical analyses are validated by experimental measurements of an aluminium plate. Our conclusions are different from those of the previous works that reported that the group velocity matching is required for the generation of the cumulative second-harmonic Lamb waves with the finite duration of tone bursts. Copyright (C) EPLA, 2016