Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (6): 113-116，123.

• Mechanics • Previous Articles     Next Articles

Simulation of Freak Waves Based on Benjamin-Feir Instability

Hu Jin-peng1  Zhang Yun-qiu2  Zhu Liang-sheng1   

  1. 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
  • Received:2008-07-02 Revised:2008-08-05 Online:2009-06-25 Published:2009-06-25
  • Contact: 胡金鹏（1975-），男，讲师，博士，主要从事随机波及其对海洋工程结构物作用研究． E-mail:jphu@seut．edu．cn
  • About author:胡金鹏（1975-），男，讲师，博士，主要从事随机波及其对海洋工程结构物作用研究．
  • Supported by:

    国家自然科学基金资助项目（10772068）;国家“863”计划项目（2006AA052426）

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Abstract:

In this paper, the four-order nonlinear Schrodinger equations and the pseudo-spectral method are introduced to develop a 2-D numerical water flume based on the Benjamin-Feir instability of random wave trains, which is adopted to simulate the freak waves in deep water. In order to verify the efficiency of the numerical water flume, the propagation distortion of random wave trains with sideband disturbances in a 2-D water flume is then simulated. The numerical results are finally compared with the test ones, showing that the proposed model simulates freak waves well.

Key words: freak wave, four-order nonlinear Schrodinger equation, Benjamin-Feir instability, pseudo-spectral method, numerical water flume