Absorbing boundary conditions for analysis of two-dimensional elastic waves using MPS method

Abstract

The absorbing boundary conditions is developed for analysis of two-dimensional elastic waves using MPS method. Absorption boundary based on PML absorbing boundaries is applied to MPS method. Performance is evaluated by giving longitudinal wave or transverse wave as input and calculating energy reflectance. When the thickness of the absorption boundary layer is 100 layers or more, the reflectance is less than -20 dB. In the case of P waves, it peaked at about -22 dB, and the performance don’t improve even when the thickness is 200 layers. In the case of S waves, it peaked at about -32 dB.