Element-free galerkin method for response of stratified seabed under wave action

A numerical model for the dynamic response of anisotropic and inhomogeneous seabed under wave action is developed based on the element-free Galerkin method for Biot's dynamic consolidation equations. Variations of the permeability and the elasticity of the soil in the vertical direction, which is an intrinsic feature of the stratified seabed, are considered. The numerical model is validated under isotropic and homogeneous conditions. The effects of the cross-anisotropy and inhomogeneity on the seabed response and shear failure are found to be remarkable. If the vertical increase of elastic modulus is taken into account, a significant decrease of the depth of shear failure can be expected.