各向异性对非均匀折射纵波的影响

Influence of anisotropy on inhomogenously refracted P-wave

根据岩石的各向异性,将非均匀折射纵波入射到固-固介质界面,通过分析异常入射角存在与不存在两种情况,分别建立椭圆极化方程。利用Christoffel方程,建立极化系数与各向异性参数之间的关系,分析并讨论了岩石各向异性参数对非均匀折射纵波的影响。数值仿真结果表明,非均匀折射纵波的初始相位会随着岩石的各向异性参数的变化而变化,并且也会改变其极化轨迹,使得极化轨迹的形状和大小发生变化。

According to the anisotropy of the rock, the inhomogenous refracted P-wave incident at the interface of two different solids. An elliptical-polarization equation is established by analyzing and discussing two situations where the anomalous incident-angle exists or not. Through the e- quation of Christoffel, the relationship between the polarization coefficient and the anisotropy pa- rameter is established. The influence of anisotropic parameters on the inhomogenous refracted P- wave is then discussed. Numerical Simulation results show that the initial phase angle of the el- liptical-polarization trajectory would change with the change of the rock anisotropy parameters, and same as the elliptical-polarization trajectory. The anisotropy of the rock will make the shape and size of the elliptical-polarization trajectory change.