波浪非线性对斜坡堤透浪特性影响研究

利用三维动压模型NHWAVE模拟了不越浪斜坡堤的透浪试验,并使用物理模型数据进行了验证。通过厄塞尔指数和波陡研究波浪非线性对斜坡堤透浪特性的影响,并采用相对长度(相对堤宽B/L)而不是绝对长度(B)来表示静水面处的堤身宽度。在此基础上计算得到新的透浪系数K L,同时讨论了堤后透浪系数与波浪非线性等因素之间的关系。结果表明,波浪非线性对透浪系数有着非常显著的影响。最后根据试验结果拟合出斜坡堤透浪系数的经验公式,为防波堤工程建设提供一定的参考依据。

Influence of wave non-linearity on wave transmission characteristics of rubble mound breakwater

A three-dimensional dynamic pressure model NHWAVE was used to simulate the wave transmission experiment of a slope breakwater without overtopping,and validated by the experiment data.The effects of wave non-linearity on the wave transmission characteristics of the rubble mound breakwater were investigated using the Ursell number and wave steepness,and relative length(relative breakwater width B/L)was insteaded of absolute length(B)to indicate the width of the breakwater at the calm water surface.On this basis,a new wave permeability coefficient K L was calculated,and the relationship between the wave transmission coefficient and wave non-linearity was discussed.It is suggested that the non-linearity character of waves has a strong influence on the wave transmission coefficient.Finally,based on the results of numerical modeling,an empirical formula of wave transmission coefficient was developed,which provided the reference for breakwater construction and scientific research.