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多方向不规则波传播变形数值模拟
引用本文:潘军宁,左其华,王红川.多方向不规则波传播变形数值模拟[J].海洋工程,2004,22(3):14-19,29.
作者姓名:潘军宁  左其华  王红川
作者单位:1. 河海大学,交通与海洋工程学院,江苏,南京,210098;南京水利科学研究院,江苏,南京,210024
2. 南京水利科学研究院,江苏,南京,210024
摘    要:在推广的缓坡方程数学模型基础上建立了多方向不规则波数学模型,综合考虑了波浪折射、绕射、反射、底摩擦和风能输入等因素。基于线性波浪理论,将波浪方向谱在频率和方向上按等能量分割法离散后,分别计算各组成波的传播变形,再计算合成波要素。缓坡方程数学模型采用改进的ADI法求解,计算效率高,稳定性好。采用椭圆形浅滩不规则波模型试验结果和单突堤不规则波绕射理论解对数学模型进行了验证,数值模拟结果和试验值及理论解符合良好。利用该模型进行了某港港内波浪折射、绕射和反射的联合数值模拟,给出了合理的港内波高分布。

关 键 词:不规则波  方向谱  折射  绕射  反射  数值模拟
文章编号:1005-9865(2004)03-0014-06

Numerical modelling of multi-directional irregular wave propagation and deformation
PAN Jun-ning.Numerical modelling of multi-directional irregular wave propagation and deformation[J].Ocean Engineering,2004,22(3):14-19,29.
Authors:PAN Jun-ning
Institution:PAN Jun-ning~
Abstract:A multi-directional irregular wave model is established based on the extended Mild-Slope Equation, in which the main factors are involved, such as refraction, diffraction, reflection, bottom friction and wind energy input. Directional wave spectrum is discretized in frequency and direction domain by an energy equalisation method, and calculation is conducted for each wave component. The modified ADI method is applied to solve the wave equation, which is of high efficiency and stability. The model is applied to calculate wave propagation on the bathymetry with an elliptic shoal and wave diffraction around a semi-infinite breakwater, and the results given by the model agree well with the experiment data and theoretical solution. Irregular wave refraction, diffraction and reflection modelling for a harbour is conducted and a sound wave height distribution in the harbour is given. The study shows that the present model can be applied to wave field modelling for port and coastal engineering.
Keywords:irregular wave  directional spectrum  refraction  diffraction  reflection  numerical modelling
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