Application of the perfectly matched absorbing layer model to the linear elastodynamic problem in anisotropic heterogeneous media

摘要

We present and analyze a perfectly matched, absorb- ing layer model for the velocity-stress formulation of elastodynamics. The principal idea of this method con- sists of introducing an absorbing layer in which we decompose each component of the unknown into two auxiliary components: a component orthogonal to the boundary and a component parallel to it. A system of equations governing these new unknowns then is con- structed. A damping term finally is introduced for the component orthogonal to the boundary.