| A Finite Element Solution of Wave Forces on Submerged Horizontal Circular Cylinders |
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| 作者姓名： | 赵明 滕斌 谭丽 |
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| 作者单位： | StateKeyLaboratoryofCoastalandOffshoreEngineering,DalianUniversityofTechnology,Dalian116024,China |
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| 基金项目： | ThisresearchprojectisfinanciallysupportedbytheNationalNaturalScienceFoundationofChina (GrantNo.
5 0 0 2 5 92 4)andtheChinaPostdoctalScienceFoundation (GrantNo.2 0 0 3 0 3 3 3 68) |
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| 摘 要： | In this paper, a numerical model is established for estimating the wave forces on a submerged horizontal circular cylinder. For predicting the wave motion, a set of two-dimensional Navier-Stokes equations is solved numerically with a finite element method. In order to track the moving non-linear wave surface boundary, the Navier-Stokes equations are discretized in a moving mesh system. After each computational time step, the mesh is modified according to the changed wave surface boundary. In order to stabilize the numerical procedure, a three-step finite element method is applied in the time integration. The water sloshing in a tank and wave propagation over a submerged bar are simulated for the first time to validate the present model. The computational results agree well with the analytical solution and the experimental data.Finally, the model is applied to the simulation of interaction between waves and a submerged horizontal circular cylinder.The effects of the KC number and the cylinder depth on the wave forces are studied.
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| 关 键 词： | 有限元 溶解 数字模型 海浪 圆柱体 |
A Finite Element Solution of Wave Forces on Submerged Horizontal Circular Cylinders |
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| ZHAO Ming,TENG Bin and TAN Li State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian ,China.A Finite Element Solution of Wave Forces on Submerged Horizontal Circular Cylinders[J].China Ocean Engineering,2004,18(3):335-346. |
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| Authors: | ZHAO Ming TENG Bin and TAN Li State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian China |
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| Institution: | ZHAO Ming,TENG Bin 1 and TAN Li State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China |
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| Abstract: | In this paper, a numerical model is established for estimating the wave forces on a submerged horizontal circular cylinder. For predicting the wave motion, a set of two dimensional Navier Stokes equations is solved numerically with a finite element method. In order to track the moving non linear wave surface boundary, the Navier Stokes equations are discretized in a moving mesh system. After each computational time step, the mesh is modified according to the changed wave surface boundary. In order to stabilize the numerical procedure, a three step finite element method is applied in the time integration. The water sloshing in a tank and wave propagation over a submerged bar are simulated for the first time to validate the present model. The computational results agree well with the analytical solution and the experimental data. Finally, the model is applied to the simulation of interaction between waves and a submerged horizontal circular cylinder. The effects of the KC number and the cylinder depth on the wave forces are studied. |
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| Keywords: | finite element method Navier-Stokes equations wave force circular cylinder |
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