傾斜機能圧電平板の波動伝播特性と応答解析 : 第2報, 計算結果

概要

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The numerical methods presented in the previous paper for the wave propagation analysis of anisotropic functionally gradient piezoelectric material (FGPM) plates are applied to a hypothetical FGPM plate. The frequency spectum, energy velocities, electromechanical coupling constants, and the mode shapes of the waves in the FGPM plate are obtained. The transient responses of the FGPM plate excited by a line time-step impact load, a line electrode, and interdigital electrodes are computed. The results obtained for the FGPM plate and a homogenous z-x LiTaO_3 plate are compared. It is found that the displacements are much more concentrated on the softer surface of the FGPM plate than on the surfaces of the homogeneous plate, and that the displacement responses corresponding to the surface waves of the FGPM plate are larger than those of the homogeneous plate. A pseudo-SH surface wave whose penetration depth is as small as that of the Rayleigh wave is discovered.
一般社団法人日本機械学会の論文
1991-09-25