Numerical Modelling of Poro-Elastoplastic Seabed under Combined Waves and Currents

摘要

This paper presents an integrated model for the wave(current)-inducedrnseabed response. The Reynolds-Averaged Navier-Stokers (RANS)rnEquations and k-ε turbulence model are applied in the fluid field andrnthe poro-elastoplastic model is used to simulate the seabed response.rnValidation of the present integrated model is presented first. Then therneffect of currents on the seabed response is examined by consideringrnboth the oscillatory and residual mechanisms of the pore pressure insidernthe soil. A parametric study is conducted to examine the characteristicsrnof the poro-elastoplastic model here. It shows that the development ofrnthe two-dimensional liquefaction zone can be illustrated by the presentrnmodel. Besides, results show that opposite direction between waves andrncurrents yields faster liquefaction process compared to the samerndirection.