Theoretical analysis of damping effects of guided elastic waves at solid/fluid interfaces
Theoretical analysis of damping effects of guided elastic waves at solid/fluid interfaces
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DOI：
10.1063/1.2168242
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发表时间：
2006-03-01
影响因子：
3.2
通讯作者：
Blondeau-Patissier, V
中科院分区：
文献类型：
--
作者：
Ballandras, S;Reinhardt, A;Blondeau-Patissier, V
提出了理想粘性流体介质的理论描述，以解决对表面声波以及更一般地粘性流体和固体之间的界面处的任何引导弹性波的阻尼效应进行建模的问题。它基于弹性传播问题的 Fahmy-Adler 特征值表示，适合提供所考虑介质的格林函数。它利用了以前为数值稳定格林函数计算过程所做的努力。该函数用于根据 Blotekjaer 方法计算谐波导纳。报告并讨论了声辐射和粘性效应对各种基底上激发的不同类型波的影响。 (c) 2006 年美国物理研究所。
A theoretical description of ideal and viscous fluid media is proposed to address the problem of modeling damping effects of surface acoustic waves and more generally of any guided elastic waves at the interface between viscous fluids and solids. It is based on the Fahmy-Adler eigenvalue representation of the elastic propagation problem, adapted to provide Green's function of the considered media. It takes advantage of previous efforts developed to numerically stabilize Green's-function computation process. This function is used to compute a harmonic admittance according to the Blotekjaer approach. The influence of acoustic radiation and viscosity effects on different kinds of waves excited on various substrates is reported and discussed. (c) 2006 American Institute of Physics.