Second-order Stokes wave-induced dynamic response and instantaneous liquefaction in a transversely isotropic and multilayered poroelastic seabed

The ocean waves exhibit obvious non-linearity with asymmetric distribution of wave crests and troughs, which could induce significantly different effect on the seabed compared to commonly used linear theory. In this paper, a semi-analytical solution for transversely isotropic multilayered poroelastic under non-linear is proposed by virtue dual variable position (DVP) method. are, respectively, modelled using second-order Stokes theory Biot’s complete poroelastodynamic Then established governing equations are decoupled solved via powerful scalar potential functions. Making use DVP scheme, layered solutions finally gained combining boundary conditions seabed. developed verified comparing existing solutions. selected numerical examples presented investigate main parameters dynamic response evaluate corresponding liquefaction potential. results show that anisotropic stiffness permeability, degree saturation stratification have remarkable influence behavior present useful tool estimate stability sediment in range wave.