| 波浪沿斜面传播过程的数值模拟 |
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| 引用本文： | 于国友,刘志良,苗青.波浪沿斜面传播过程的数值模拟[J].海洋技术,2007,26(4):20-22,26. |
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| 作者姓名： | 于国友 刘志良 苗青 |
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| 作者单位： | 1. 东莞理工学院建筑工程系,广东省东莞市,523808
2. 天津大学建筑工程学院,天津,300072 |
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| 基金项目： | 教育部留学回国人员基金 |
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| 摘 要： | 精确模拟非线性波沿斜面传播过程非常困难,为此论文从势函数的边界积分方程出发,建立了一种时域内二维波浪模拟的数值模型,主要用来模拟完全非线性波浪的传播变形过程。论文的数值模型使用高阶二维边界元方法,采用可调节时间步长的基于二阶显式泰勒展开的混合欧拉-拉格郎日时间步进来求解带自由表面的线性或完全非线性波浪传播问题。在计算区域一端造出线性或非线性的周期性波浪,另一端采用消除反射波的人工粘性吸收边界。通过与现有理论比较证明了论文数值方法所得结果是准确可靠的。
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| 关 键 词： | 边界元 斜面 非线性波 波浪传播 |
| 文章编号： | 1003-2029（2007）04-0020-04 |
| 收稿时间： | 2007-03-15 |
| 修稿时间： | 2007年3月15日 |
Numerical Simulation of Wave Deformation Caused by Inclined Water Bottom |
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| YU Guo-you,LIU Zhi-liang,MIAO Qing.Numerical Simulation of Wave Deformation Caused by Inclined Water Bottom[J].Ocean Technology,2007,26(4):20-22,26. |
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| Authors: | YU Guo-you LIU Zhi-liang MIAO Qing |
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| Abstract: | Based on the boundary integration equation of two dimensional Laplace equations,a nonlinear time domain numerical model for wave transformation is given in this paper.The numerical method is applied to analyze both linear and nonlinear wave deformations caused by inclined water bottom.It is also used to solve fully nonlinear potential flow equations with a free surface by use of a higher-order boundary element method(HOBEM)together with a mixed Eulerian-Lagrangian time updating method based on the second-order explicit Taylor series expansions.Either linear or nonlinear periodic waves are generated at one end:and absorbing wave boundary conditions are specified at the other end.The results are verified through comparison with existing methods. |
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| Keywords: | boundary element method inclined water bottom nonlinear wave wave propagation |
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