一种模拟特定畸形波列的相位调制方法（英文）  

A Phase Modification Methodology in Modelling Deterministic Freak Wave Train

作　　者：高宁波[1,2] 张鸿 杨建民[1] 田新亮 李欣[1] GAO Ning-bo;ZHANG Hong;YANG Jian-min;TIAN Xin-liang;LI Xin(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200030,China;Postdoctoral Research Center,CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430040,China;CCCC Highway Bridges National Engineering Research Center Co.,Ltd.,Beijing 100088,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]中交第二航务工程局有限公司,武汉430040 [3]中交公路长大桥建设国家工程研究中心,北京100088

出　　处：《船舶力学》2019年第9期1021-1033,共13页Journal of Ship Mechanics

基　　金：Supported by the National Natural Science Foundation of China(Grant No.51239007);China Postdoctoral Science Foundation(Grant No.2017M612543)~~

摘　　要：海洋中畸形波能够给船舶与海洋结构物带来巨大危害。准确地模拟特定畸形波列是研究其与结构物相互作用的基础。文章基于商业计算流体动力学软件FLUENT建立了一个数值波浪水池。通过线性聚焦方法给定一个畸形波时历,采用傅里叶分析来求解畸形波时历中每一个组成波的波幅和相位,提出了一种相位调制方法来提高模拟精度。将数值结果与物理水槽试验进行了对比,证明该相位调制方法能够显著提高数值模拟精度,展现了研究畸形波与结构物相互作用问题的新前景。Freak waves,which are heated and debated in oceanic community,can pose serious damages to ships and offshore structures.Accurate simulation of the deterministic freak wave trains will be a basis for understanding wave-structure interactions.In this study,a numerical wave tank(NWT)is developed based on commercial computational fluid dynamics(CFD)software package-FLUENT.A freak wave train is given through linear superposition method.Fourier series expansion is applied to determine the amplitude and the initial phase of each wave frequency component.A phase modification methodology(PMM),by modifying the initial phases,is used to improve the numerical simulation quality.This method was validated against an elaborated experiment.It proves that the PMM can significantly improve the numerical results,which might show a new perspective in the wave-structure interaction problems.

关 键 词：N-S方程 畸形波 相位调制 

分 类 号：U661.71[交通运输工程—船舶及航道工程]