非线性瑞利波在裂隙层状弹性介质中的传播模拟

2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2019-11-01 DOI:10.1109/SPAWDA48812.2019.9019264

L. Jia, Yan Guo, Juan Huang, Bi-xing Zhang

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引用次数: 1

摘要

用有限元方法分析了含微裂纹的层状半空间中的非线性瑞利波。微裂纹在瑞利波的牵引下闭合或张开。这使得瑞利波与微裂纹相互作用后可以观测到二次谐波。对于结构表面附近的微裂纹，通过微裂纹的瑞利波模可以得到二次谐波。而对于低速夹层中的微裂纹，只有低频瑞利波模与微裂纹相互作用才能获得二次谐波。此外，微裂纹的长度和宽度对非线性效应的程度也有影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Simulation of Nonlinear Rayleigh Waves Propagation in Cracked Layered Elastic Medium

The nonlinear Rayleigh waves in layered half space with micro-cracks are analyzed by using finite element method. The micro-cracks close or open under the traction of Rayleigh waves. This leads that the second harmonic of Rayleigh waves can be observed after interacting with micro-cracks. For micro-cracks near the surface of structures, the second harmonics can be obtained from Rayleigh waves modes passing through micro-cracks. However, for micro-cracks in the low-velocity interlayer, the second harmonics can be obtained only when the Rayleigh waves modes at low frequency interact with micro-cracks. Besides, the level of the nonlinear effect is influenced by the length and width of micro-cracks.

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来源期刊

2019 14th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA)

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