The crux of the present study is to analyze the dispersion characteristics of the Love-type wave in a micropolar elastic stratum overlying a functionally graded transversely isotropic substrate. An influencing impulsive point source is considered at the interfacial surface. Non-traditional boundary conditions at the common interface of the stratum and substrate are enforced due to the consideration of micropolarity in the stratum. The micropolar effect in the stratum asserts the existence of a new type of dispersive wave, besides the conventional Love-type wave. Green’s function comes in handy as an effective mathematical tool to derive the dispersion equations of both the Love-type wave and the new type of dispersive wave. Validity conditions for both the dispersive waves are established, and a common range of existence is also identified. The result of the Love-type wave is reduced to validate with the classical result of the Love wave. It is noted that without the consideration of micropolarity, the new type of dispersive wave ceases to exist. A detailed study is carried out through graphical illustrations to highlight the obscured characteristics of the Love-type wave and the new type of dispersive wave in response to the various influencing parameters, namely, micropolar parameter, functional gradients, and anisotropy.

本研究的关键是分析勒夫型波在功能梯度横观各向同性基底上的微极弹性地层中的色散特性。在界面处考虑了影响脉冲点源。由于考虑了地层的微极性，在地层和基底的公共界面处强制执行非传统边界条件。地层中的微极效应表明，除了传统的拉夫型波之外，还存在一种新型色散波。格林函数作为一种有效的数学工具可以派上用场，可以用来推导拉夫型波和新型色散波的色散方程。建立了两种色散波的有效性条件，并确定了共同的存在范围。爱型波的结果被简化以与爱波的经典结果进行验证。值得注意的是，如果不考虑微极性，新型色散波就不复存在。通过图解的方式进行了详细的研究，突出了拉夫型波和新型色散波对微极性参数、函数梯度和各向异性等各种影响参数的模糊特征。