结合压电半空间中界面波的存在性

M. Abbudi, D. Barnett
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引用次数: 33

摘要

提出了基于压电加筋声张量的压电极限速度的新定义。在Lothe & Barnett引入的Φ和F表示中,结合压电半空间的Stoneley波问题很容易被表述出来。压电界面阻抗张量F的概念是弹性界面阻抗张量的扩展,用来证明最多可以出现两个亚音速斯通利波。给出了单个亚音速压电斯通利模态存在的确定判据,给出了在给定几何形状和材料组合条件下寻找斯通利模态的数值格式,并给出了两个连接的硫化镉半空间的数值实例。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the existence of interfacial (Stoneley) waves in bonded piezoelectric half-spaces
A new definition of the piezoelectric limiting speed, based on the piezoelectrically stiffened acoustical tensor is introduced. The Stoneley wave problem is readily formulated for bonded piezoelectric half-spaces in both the Φ and F representations introduced by Lothe & Barnett. The notion of the F piezoelectric interfacial impedance tensor, which is an extension of the elastic interfacial impedance tensor, is used to show that a maximum of two subsonic Stoneley waves can occur. A definite existence criterion for a single subsonic piezoelectric Stoneley mode is given, and a numerical scheme that searches for Stoneley modes, when they exist for a given geometry and material combination, is also presented along with a numerical example for two joined cadmium sulphide half-spaces.
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