ABAQUS/Explicit analysis module was used in this paper to simulate the riser's behavior under tension force and inner pressure. It presents a technique to create detailed finite element model and to analyze flexible risers automatically by using input geometry parameters. In the FEM model, all layers are modeled separately with contact interfaces between each layer. The FEM model includes the main features of the riser geometry with very little simplifying assumptions. A 3D FEM model considering contact interaction, geometric nonlinearity, and friction has been employed to accurately simulate the structural behavior of an eight-layer flexible riser under tension and inner pressure load cases. The model was solved using a fully explicit time-integration scheme implemented in a parallel environment on an eight-processor cluster and 24-G memory. The results from the numerical simulation show that the numerical model takes into account various details of the physical riser while they are not possible to include in the analytical models. It has been shown here that the detailed finite element model can be used as a virtual testing machine to high efficiently obtain parametric studies on the riser and to predict its mechanics behavior under various load case and bound condition. It can in turn lead to improved practical engineering design of riser.
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