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研究非理想界面下功能梯度压电/压磁层状半空间结构中SH波的传播特性。界面性能由“弹簧”模型表征,假设功能梯度压电层材料性能沿层厚度方向指数变化,其表面为电学开路。推导了频散方程,并结合数值算例分析了界面性能、功能梯度压电层的梯度变化和厚度对相速度的影响。研究结果对功能梯度压电/压磁复合材料在声波器件中的应用提供了理论依据。
The propagation characteristics of SH wave in functional gradient piezoelectric / piezomagnetic layered half-space structure under non-ideal interface are studied. The interface properties are characterized by the “spring” model, which assumes that the functional graded piezoelectric layer changes exponentially along the thickness of the layer and has an electrically open surface. The dispersion equation is deduced, and the influence of the interfacial properties, the gradient of the functional gradient piezoelectric layer and the thickness on the phase velocity are analyzed with numerical examples. The results provide a theoretical basis for the application of functional gradient piezoelectric / piezomagnetic composites in acoustic wave devices.