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本文在高频射线近似的条件下,运用几何地震学方法,研究了倾斜界面情况下PS透射转换波及部分二次波的偏振特征和运动学特征。发现这些波的偏振参数对模型界面倾斜性十分敏感,可用来反演界面倾斜参数。转换波及部分二次波的偏振分布及其相互关系为震相识别提供了新的判据。文章还给出了分析实际地震记录中震相偏振特性的PP(Polarization Position)图方法及震相识别和相位对比中的最佳分量追踪法。
In the condition of high-frequency ray approximation, the geometrical seismology method is used to study the polarization and kinematics characteristics of PS transmission and some of the second-order waves under the condition of inclined interface. It is found that the polarization parameters of these waves are very sensitive to the slope of the model interface and can be used to invert the interface tilt parameters. The polarization distributions of the partially propagating wave and some correlations between them provide a new criterion for the phase identification. The article also gives a Polarization Position (Polarization Position) graph method to analyze the phase polarization characteristics in actual seismograms and the best component tracking method in phase identification and phase contrast.