铌镁酸铅-钛酸铅单晶/压电双层结构材料中SH波的传播特性

摘要/Abstract

摘要：

将压电晶体板上、下表面的力学边界条件设为机械自由，其电学边界条件中分别考虑电学开路、电学短路和与空气介质相连的组合，基于铌镁酸铅钛酸铅(PMN-PT)压电单晶的本构方程得到了频散方程，推导了反平面水平剪切(SH)波传播的一般解，分析了边界条件和压电双层晶体结构的层厚比对频散曲线的影响.结果表明，SH波的某些传播性能可以通过边界条件的处理和结构的设计来实现.

关键词: , 压电材料；铌镁酸铅钛酸铅；水平剪切波；相速度；频散关系

Abstract:

The upper and lower surfaces of the double layer structure are mechanically free. The electrical boundary conditions are electrically open, electrically short and connected with the air medium. The general solution of the SH waves are obtained by the constitutive equations of the PMN-PT piezoelectric materials. The dispersion curves are affected by the boundary conditions and the thickness ratio of the structure. The obtained results show that the propagation properties can be achieved in the processing of the boundary and the design of the structure.

Key words: piezoelectric material, PMN-PT, shear horizontal wave, phase velocity, dispersion relation

中图分类号:

O 347.4

孔艳平，刘金喜. 铌镁酸铅-钛酸铅单晶/压电双层结构材料中SH波的传播特性[J]. 上海交通大学学报（自然版）, 2014, 48(09): 1323-1328.

KONG Yanping,LIU Jinxi. Propagation of SH Waves in PMNPT Single Crystal/Piezoelectric Double Layer Structure[J]. Journal of Shanghai Jiaotong University, 2014, 48(09): 1323-1328.

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