Analysis of harmonic generation in Lamb waves by finite-difference time-domain method

Analysis of harmonic generation in Lamb waves by finite-difference time-domain method
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DOI：
10.1063/1.4749328
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发表时间：
2012-09
期刊：
--
影响因子：
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通讯作者：
N. Matsuda;S. Biwa
N. Matsuda;S. Biwa
中科院分区：
其他
文献类型：
--
作者：
N. Matsuda;S. Biwa

文献摘要

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数值分析了兰姆波传播过程中的谐波产生特性。时域有限差分法（FDTD），这已被扩展，以纳入应力应变非线性以及运动非线性。利用该FDTD方法，对板中存在局部非线性增强区域的情况进行了非线性Lamb波传播的数值模拟，并讨论了该区域的大小对谐波产生行为的影响。
Harmonic generation characteristics in Lamb wave propagation are analyzed numerically. The finite-difference time-domain (FDTD) scheme, which has been extended was used to incorporate the stress-strain nonlinearity as well as the kinematical nonlinearity. Using this FDTD scheme, numerical simulations of nonlinear Lamb wave propagation are carried out for the case where a plate has a locally concentrated region of enhanced material nonlinearity, and the influence of the size of this region on the harmonic generation behavior is discussed.