Applicability evaluation of earthquake wave and influence evaluation of surface wave in FEM-CPML ground model

Abstract

PML(Perfectly matched layer), especially Convolutional PML is known to have high capability of wave absorption. Unfortunately, it is not possible to input earthquake waves through PML, contrary to viscous damper. A method to apply seismic waves on FEM domain enclosed by Convolutional PML is described for material with damping. By comparing the numerical results by this method with those by conventional methods, the validity of the proposed method is shown. The effect of each PML parameter is also clarified. Next, Convolutional PML is applied to the model with elongated domain in numerical simulation of surface wave and its superiority over Conventional PML and viscous boundary is demonstrated by numerical results.