3-D Numerical Model for Wave-Induced Seabed Response around an Offshore Pipeline

Seabed instability around an offshore pipeline is one
of key factors that need to be considered in the design of offshore
infrastructures. Unlike previous investigations, a three-dimensional
numerical model for the wave-induced soil response around an
offshore pipeline is proposed in this paper. The numerical model was
first validated with 2-D experimental data available in the literature.
Then, a parametric study will be carried out to examine the effects of
wave, seabed characteristics and confirmation of pipeline. Numerical
examples demonstrate significant influence of wave obliquity on the
wave-induced pore pressures and the resultant seabed liquefaction
around the pipeline, which cannot be observed in 2-D numerical
simulation.

Authors:

• Zuodong Liang
• Dong-Sheng Jeng

Keywords:

• Pore pressure
• 3D wave model
• seabed liquefaction
• pipeline.

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