The Numerical Simulation of Pipe/Soil Interaction Under Wave Loadings

Abstract

The on-bottom stability of submarine pipeline is a key problem of submarine pipeline design.The key issue is to simulate the interaction among wave,pipe and soil. In this paper, the constitutive models of soil, such as nonlinear elastic, porous elastic and Ramberg-Osgood models are adopted respectively, and the pipe/soil interaction has been analyzed by the common finite element software ABAQUS program. The contact surfaces have been established. The factors such as contact effect,frictional coefficient between pipe and soil ,pipe's penetration, the impact of yielding stress are considered. Also, the results show that the computation of the pipe/soil interaction is feasible and may provide a helpful tool for the engineering practice of pipeline on-bottom stability design.

Upheaval Buckling Analysis of Buried Offshore Pipelines under High Temperature and High Pressure

“…5.5m), length of seabed soil model is taken 100 times of the diameter of pipelines (i.e. 50m)[5] , and the depth of offshore pipelines buried in the seabed soil is 1m.The interaction between seabed soil and offshore pipelines is very complex, Moor-Coulomb plasticity model is used in the numerical simulation of seabed soil, mainly through parameters of friction angle, expansion angle and cohesion to describe the mechanical properties of the soil.1.3 Oil modelOil model is created by finite element software ABAQUS/CFD module and oil element type is FC3D8. Oil diameter is inner diameter of the pipelines, (i.e.…”