Stability of High-Order Finite-Difference Schemes for Poroelastic Wave Simulation

The stability of high-order finite-difference schemes on a staggered-grid for two-dimensional poroelastic wave equations with spatially varying material parameters is studied. Using the energy method, we obtain sufficient stability conditions. This al-lows to find suitable time and spatial steps according to material parameters and the difference scheme coefficients. Two numerical examples verify the theoretical analysis and show that the corresponding range for the time step is close to that in the neces-sary condition. The perfectly matched layer is adopted in order to eliminate boundary reflections.