挪威北海最大波高的影响分析

发布时间：2018-10-20 18:31

【摘要】：最大波高作为表征海浪强度和危险程度的重要指标,既是设计波浪推算的依据,同时又对海洋预报有重要的作用。基于瑞利分布得到的最大波高公式,不能体现波陡和谱宽度等非线性因素的影响,由该公式得出的理论最大波高与实际观测值有偏差。采用相位平均方法的海浪数值模型分析,可以根据海浪谱计算得到有效波高,却无法给出最大波高。本文通过分析挪威北海定点十年的船测波面资料,得出波浪谱,进一步推算出波陡和谱宽度对最大波高的影响。首先提出一种实测波数的替代方式,然后分别研究波陡和谱宽度对最大波高的影响。研究发现随着波陡和谱宽度的增加,Hmax/Hs逐渐减小,并拟合出最大波高与Cartwright谱宽度参数的公式,得到较好的拟合效果。
[Abstract]:The maximum wave height, as an important indicator of wave strength and dangerous degree, is not only the basis of designing wave prediction, but also plays an important role in ocean prediction. The maximum wave height formula based on Rayleigh distribution can not reflect the influence of nonlinear factors such as wave steepness and spectral width. The theoretical maximum wave height obtained from the formula deviates from the observed value. According to the wave spectrum, the effective wave height can be calculated, but the maximum wave height can not be obtained. In this paper, the wave spectrum is obtained by analyzing the wave surface data of Norway North Sea for ten years, and the influence of wave steepness and spectral width on the maximum wave height is further calculated. In this paper, an alternative method of wave number measurement is proposed, and then the effects of wave steepness and spectral width on the maximum wave height are studied respectively. It is found that the Hmax/Hs decreases with the increase of wave steepness and spectral width, and the formula of maximum wave height and Cartwright spectral width parameter is fitted, and a good fitting effect is obtained.
【作者单位】：海岸灾害及防护教育部重点实验室(河海大学);河海大学港口海岸与近海工程学院;
【基金】：国家自然科学基金(51579091,41106001) 江苏省“青蓝工程”优秀青年骨干教师项目资助
【分类号】：P731.22

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