3D Modeling of Wave-Seabed-Pipeline in Marine Environments

摘要

In this study, a three-dimensional numerical model is developed, based on the Finite Element Method, to analysethe behaviour of soil under the wave loading. The pipeline is assumed to be rigid and anchored within a trench. Theinfluence of wave obliquity on seabed responses, the pore pressure and soil stresses, are studied, which cannot be handledby the existing 2D models. It is revealed that three-dimensional characteristics systematically affect the distribution of soilresponse around the circumference of the underwater pipeline. Based on new 3D model, the effects of wave and soil characteristicsand trench configuration on the wave-induced seabed instability are discussed in detail.