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三维二阶水波绕射问题的有限元时域计算 被引量:1

Calculation of time domain of second order wave diffraction in three dimensions with finite element method
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摘要 本文用有限元法配合时步处理来求解三维非线性水波的绕射问题 ,自由表面条件和物面条件都满足到二阶 ,采用人工阻尼区来吸收反射波 ,流场内的速度势通过求解有限元方程得到。对垂直圆柱体的绕射问题进行了计算 ,得到了自由表面波高时间历程和圆柱所受到的波浪力 ,计算结果和有关文献的理论计算结果进行了比较。 The FEM with time marching is employed to analyze the time domain of second order non linear 3D water waves. The free surface boundary condition and the body boundary condition are satisfactory to second order at each time step. The diffraction wave is absorbed with an artificial damping zone instead of Sommerfeld radiation condition, and at each time step the velocity potential in the fluid field is solved by the FEM. The diffraction of the vertical circular cylinder is selected as a numerical example for verifying the efficiency of the present method. The time histories of wave elevations and wave forces on the cylinder are calculated. The results have been compared with those by the previous theoretical method.
出处 《海洋工程》 CSCD 2000年第1期13-19,共7页 The Ocean Engineering
关键词 有限元法 非线性水波 二阶理论 绕射 波浪力 finite element method nonlinear wave second order theory diffraction wave forces
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参考文献15

  • 1[1]Molin B.Second-order diffraction loads upon three-dimensional bodies[J].Applied Ocean Research, 1979, 1(4):197~202.
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二级参考文献5

  • 1缪国平.三维问题中二阶波浪力理论计算的注记[J]水动力学研究与进展,1987(02).
  • 2缪国平,刘应中.大直径圆柱上的二阶波浪力[J]中国造船,1987(03).
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  • 5陶建华,丁旭.大尺度结构物的二阶波浪荷载[J].力学学报,1988,20(5):385-392. 被引量:6

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