正交各向异性弹性层/功能梯度压电半空间结构中Love波的传播  

Propagation of Love Waves in the Orthotropic Layer/Functionally Graded Piezoelectric Half-Space

作　　者：孔艳平[1] 陈长虹[2] 刘金喜[1] 

机构地区：[1]石家庄铁道大学工程力学系,石家庄050043 [2]石家庄铁道大学机械工程学院,石家庄050043

出　　处：《上海交通大学学报》2013年第2期210-215,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(10972147);长江学者和创新团队发展计划(IRT0971)资助项目

摘　　要：研究了功能梯度压电半空间上覆盖一层正交各向异性弹性层结构中Love波的传播特性.覆盖层与基底的界面连接方式分别考虑了理想接触和非理想接触2种模式,功能梯度压电半空间的材料性能沿垂直于界面方向以指数函数形式变化.基于推导的频散方程,结合数值算例分析了材料性能梯度变化、正交各向异性材料的切割角度和非理想界面的连接程度对相速度的影响,其结果对功能梯度压电材料的覆层结构在声波器件中的应用具有重要的参考价值.This paper investigated Love waves propagating in the layered half-space structure consisting of an orthotropic layer and a functionally graded piezoelectric half-space. The interface conditions of the lay- ered half-space structure are perfect and imperfect. The material properties of the piezoelectric half-spaces vary exponentially in the direction perpendicular to the interfaces. Based on the dispersion equations, the numerical examples were presented to show the effects of variations of material properties, the cut angle of the orthotropic material and combined effects of the imperfect interface on the phase velocity. The obtained results are useful for the application of functionally graded piezoelectric materials to acoustic wave devices such as plate resonators, filters and sensors.

关 键 词：功能梯度材料 压电材料 正交各向异性 LOVE波 频散 

分 类 号：O346[理学—固体力学]