The aim of the present study is to analyze the propagation behavior of an SH wave in a layered structure constituted of a functionally graded piezo-poroelastic material (FGPPM) layer imperfectly bonded to an FGPPM half-space influenced by a stress point source of disturbance situated at the interface. Mass loading sensitivity of the considered structure is also analyzed by assuming a deposition of an infinitesimally thin layer at the free surface. A mathematical model for mechanical and electrical dynamics of the said material is developed for both considered structures in distinct cases. Appropriate Green’s functions for both layer and half-space are derived by using admissible boundary conditions. The dispersion relation of an SH wave is obtained for both cases, and the obtained results are also validated with classical results of Love wave. The impact of various influencing parameters like functional gradient parameters, imperfectness parameter, piezoelectric coupling parameter, and piezo-porous coupling parameter on the phase velocity of an SH wave is analyzed graphically for a BaTiO $$_3$$ 3 -crystal layer and PZT-5H half-space. Moreover, for the case of the mass loading sensitivity, the influencing parameters are also studied for the deposition of a sensitive ZnO layer. Variation of group velocity with wave number is also sketched out graphically.

中文翻译：

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点源和质量负载灵敏度对不完全粘合的 FGPPM 层状结构中 SH 波传播的影响

本研究的目的是分析 SH 波在分层结构中的传播行为，该分层结构由功能梯度压电多孔弹性材料 (FGPPM) 层不完全结合到受应力点干扰源影响的 FGPPM 半空间构成。在界面上。还通过假设在自由表面沉积无限薄的层来分析所考虑结构的质量负载敏感性。针对不同情况下的两种考虑结构开发了所述材料的机械和电动力学的数学模型。层和半空间的适当格林函数是通过使用允许的边界条件导出的。得到了两种情况下SH波的色散关系，并且得到的结果也与Love波的经典结果进行了验证。对BaTiO $$_3$$ 3 - 晶体层和PZT- 的功能梯度参数、缺陷参数、压电耦合参数和压电多孔耦合参数等各种影响参数对SH波相速度的影响进行了图形分析。 5H 半空间。此外，对于质量负载敏感性的情况，还研究了敏感 ZnO 层沉积的影响参数。群速度随波数的变化也以图形方式勾勒出来。对于质量负载敏感性的情况，还研究了敏感 ZnO 层沉积的影响参数。群速度随波数的变化也以图形方式勾勒出来。对于质量负载敏感性的情况，还研究了敏感 ZnO 层沉积的影响参数。群速度随波数的变化也以图形方式勾勒出来。