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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Influence of Surface Conductivity on Dispersion Curves, Mode Shapes, Stress, and Potential for Lamb Waves Propagating in Piezoelectric Plate
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Influence of Surface Conductivity on Dispersion Curves, Mode Shapes, Stress, and Potential for Lamb Waves Propagating in Piezoelectric Plate

机译：表面电导率对压电板中传播的分散曲线，模式形状，应力以及羊波波浪的潜力

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摘要

Lamb waves propagating in piezoelectric plate covered by thin-film electrodes with arbitrary conductivity are investigated. The structure consists of three parts, piezoelectric plate, top and bottom thin films with arbitrary conductivities, and top and bottom free space. The governing equations in each part are first solved, and then, continuous conditions are used to form the propagating matrix. Finally, the dispersion equations are obtained by boundary conditions. Calculating the dispersion equations with different conductivities, the dispersion curves in high conductivity and zero conductivity are compared. The wave mode shapes of different branches are investigated, including the distributions of mechanical displacements and stresses in the piezoelectric plate and distributions of electrical displacement and potential in both plate and free space. The relationships between frequency difference and wave mode shapes in zero and high conductivity are investigated. Furthermore, the dispersion curves of general conductivity are calculated. The attenuation of waves is compared in different branches and different conductivities. The wave mode shapes are also calculated and compared with the cases in zero and high conductivities.
机译：研究了由具有任意电导率的薄膜电极覆盖的压电板中传播的LAMB波。该结构包括三个部分，压电板，顶部和底部薄膜，具有任意导电性，顶部和底部自由空间。每个部分中的控制方程首先解决，然后，使用连续条件来形成传播矩阵。最后，通过边界条件获得色散方程。计算具有不同电导率的分散方程，比较高导电性和零电导率的色散曲线。研究了不同分支的波模式形状，包括压电板中的机械位移和应力的分布以及板和自由空间中的电位移和电位的分布。研究了频率差和波模式之间的关系零和高导电性。此外，计算一般电导率的分散曲线。在不同的分支和不同的电导率下比较波的衰减。还计算波模式形状，并与零和高导电性的情况进行比较。

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