AN IMPROVED NUMERICAL METHOD FOR CALCULATIONS IN WAVE KINEMATICS  

作　　者：SUN Yi-yan LIU Shu-xue LI Jin-xuan 

机构地区：[1]State Kay Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024

出　　处：《Journal of Hydrodynamics》2009年第6期826-834,共9页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foundation of China ( Grant No.50379002);the Program for New Century Excellent Talents in University (Grant No.NCET0520282)

摘　　要：The prediction of wave kinematics is a necessary basis for ocean engineering design. In this article, an improved method to calculate the wave kinematics especially in the crest region is presented. This method is based on the local approximation method. According to one measured wave surface, the proposed solution focuses on a Fourier series expansion in a somewhat larger segment of the wave surface record. The horizontal and vertical kinematics under the wave crest can be directly predicted. Good agreement between the numerical results and the theoretical Stokes waves verifies the validity of the numerical model. The effectiveness of the numerical method is also proved by the calculation of the wave kinematics of the laboratory focused wave groups.The prediction of wave kinematics is a necessary basis for ocean engineering design. In this article, an improved method to calculate the wave kinematics especially in the crest region is presented. This method is based on the local approximation method. According to one measured wave surface, the proposed solution focuses on a Fourier series expansion in a somewhat larger segment of the wave surface record. The horizontal and vertical kinematics under the wave crest can be directly predicted. Good agreement between the numerical results and the theoretical Stokes waves verifies the validity of the numerical model. The effectiveness of the numerical method is also proved by the calculation of the wave kinematics of the laboratory focused wave groups.

关 键 词：Fourier series expansion wave kinematics focused wave 

分 类 号：O438.2[机械工程—光学工程] TP242[理学—光学]