Numerical Study Of Hydrodynamic Force Induced Pipeline Vibration

This paper presents a numerical study of the uniform flow past an elastic circular cylinder using the FEM method. The vortex-induced vibration of the circular cylinder is studied by an Arbitrary-Lagrangian-Eulerian(ALE) algorithm. A three-step Finite Element Method is applied to discrete the Navier-Stokes equations. An Arbitrary Lagrangian-Eulerian(ALE) formulation is employed to deal with the interface condition between the body and the fluid.At first, to validate the numerical model, the two-dimensional numerical simulation of Vortex-Induced Vibration of a circular cylinder at low Reynolds numbers were carried out and the calculation results were compared with measured data of other researchers'.Secondly, the Vortex-Induced Vibration of a pipeline near a plane bottom were studied. The dynamic responses of the pipeline near a plane for gaps sizes from 0 to 8 times the diameter (d) of the pipeline, were simulated and the vibration characteristics were studied attentively.In this paper, the range of Re number is from 90 to 150, and the range of gap is from 0.3 to 8.