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Joint distributions of wave height and period in laboratory generated nonlinear sea states

机译：实验室产生的非线性海况中波高和周期的联合分布

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摘要

The main goal of the work is to investigate the joint distribution of the wave heights and periods of nonlinear wave time series obtained in laboratory conditions. Three groups of laboratory experiments carried out in Marintek, Norway and in CEHIPAR, Spain are used in the work. Due to different scales of the generated waves only the series that in full scale have the same distance from the wave maker are compared. For different initial steepness of the produced wave time series the spatial variations of the main sea state parameters, the power spectral density, the joint distribution of wave heights and periods, and marginal distributions of the wave heights and the wave periods are studied. The observed results of the joint distributions are also compared with the theoretical model of Longuet-Higgins (1983). It is found that the observed joint distributions of wave heights and periods in the Marintek and in the CEHIPAR basins are similar to each other. However the results show that close to the mode of the joint density there is a deviation with different degrees of intensity from the theoretical ones, especially for large wave steepness.
机译：这项工作的主要目的是研究在实验室条件下获得的波高和非线性波时间序列的周期的联合分布。这项工作使用了在挪威Marintek和西班牙CEHIPAR进行的三组实验室实验。由于生成的波的比例不同，因此仅比较了与波发生器距离相同的满量程序列。对于产生的波浪时间序列的不同初始陡度，研究了主要海况参数，功率谱密度，波浪高度和周期的联合分布以及波浪高度和波浪周期的边际分布的空间变化。还将联合分布的观测结果与Longuet-Higgins（1983）的理论模型进行了比较。发现在Marintek和CEHIPAR盆地中观测到的波高和周期的联合分布彼此相似。但是结果表明，在接近接头密度的模式下，强度与理论强度存在差异，特别是对于大波陡度。

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