Dynamic soil-structure interaction analysis in the finite element time domain with convolutional perfectly matched layer as the boundary conditions

Convolutional perfectly matched layer (CPML) models in the finite element time domain (FETD) can save computational costs when the original problem domain is relatively large or where three-dimensional (3-d) modeling is needed. The use of CPML for solving soil-structure interaction (SSI) problems in truncated domains using finite element method has been explored in this paper. It provides a method of applying CPML models to dynamic SSI analysis in FETD with displacement as the only unknown. Relevant benchmark examples with small bounded domains have been included to demonstrate the stability and efficiency of the proposed model and formulation. An interesting application of this technique can also be found about the classical SSI problem of evaluating the responses of the building with rigid footing on a half-space under earthquake motions