Response of Saturated Porous Seabed under Combined Short-Crested Waves and Current Loading

Abstract

ABSTRACT Wen, F.; Wang, J.H., and Zhou, X.L. 2016. Response of saturated porous seabed under combined short-crested waves and current loading. Ocean currents and waves generally coexist in a real ocean environment. However, most previous investigations have only considered wave loading or have been limited to two-dimensional cases. In this study, first we derive interaction of short-crested waves and uniform currents. Then, based on Biot's consolidation (i.e. quasi-static) theory, we establish a numerical model integrating a three-dimensional model of the seabed with combined short-crested waves and current loading. Applying the proposed numerical model, we examine the influence of current on seabed response. Numerical results reveal that current has a significant effect on seabed response. For example, a following current (current in the x direction, U1 > 0) will increase pore pressure, while an opposing current (current in the x direction, U1 < 0) will decrease pore pressure. The maximum relative differ...