风浪波群中波高分布研究

在实验室风浪槽中观测风浪,发现波群连长是影响波群中波高分布的重要因素,随着波群连长增大,波群中波高分布信息熵增大。当以平均波高无因次化,连长较大时波群中波高累积概率明显大于连长较小时情形。波群中波高分布受谱宽度影响。当谱宽度增大,波群中波高累积概率降低。谱宽度和波群连长对波群中波高累积概率的影响相当。引进体现波群特性的1个无因次化波高参量研究波群中波高累积概率。

The Distribution of Wave Height in Wave Groups

The study is made on the distribution of wave height in wave groups by analyzing wind wave data in the laboratory.It is found that the run of the wave group is an important factor in influencing the distribution of wave height in wave groups.The information entropy of the distribution of wave height increases with the run of the wave group.Non-dimensionalized with average wave height,the accumulative probability of wave height in wave groups with long runs is remarkably larger than in wave groups with short runs.The wave height distribution in wave groups depends on spectral width.The accumulative probability of wave height decreases with increasing spectral width.The effect of spectral width on the accumulative probability of wave height is comparable to that of the run.A non-dimensionalizing parameter of wave height reflecting the properties of wave groups is introduced in studying the accumulative probability of wave height in the wave group.