摘要
本文采用波数矢量无旋和波能守恒方程建立了一个考虑非线性作用的浅水水波变形数值模型，模型中采用Battjes关系与波数矢量无旋，波能量守恒方程一起来求解波浪在浅水中变形的波浪要素，在波能守恒方程中考虑了底摩擦的影响。利用本文提出的数值模型对一个斜坡浅滩水域波浪折射绕射现象进行了验证，验证计算中用一个非线性经验弥散关系近似浅水水波变形的非线性效应并与用线性弥散关系的计算结果进行了比较，结果说明使用非线性弥散关系比使用线性弥散关系的结果与试验结果更加吻合，证明在浅水水域波浪的非线性作用的影响是不容忽视的。
A model has been developed to describe wave transformation in areas of shallow water using the irrationality of the wave-number vector and the energy conservative equation. The Battjes relation is used in the mathematical model to solve wave refraction and diffraction. The model is tested against laboratory measurements for the case of submerged circular islands on a slope, where both refraction and diffraction are equally significant. An approximate representation of nonlinear effect is also included by employing dispersion relation. The computed results show that the nonlinear effect in shallow water is important.
出处
《海洋湖沼通报》
CSCD
北大核心
1998年第1期1-5,共5页
Transactions of Oceanology and Limnology
关键词
非线性效应
波数矢量
海水
波浪
浅水水波
Nonlinear effect, refraction, diffraction, wave number vector
