Characteristics of abnormal waves in North Sea storm sea states

被引：98
|
作者：
Soares, CG [1 ]
Cherneva, Z [1 ]
Antao, EM [1 ]
机构：
[1] Univ Tecn Lisboa, Inst Super Tecn, Unit MarineTechnol & Engn, P-1049001 Lisbon, Portugal
来源：
APPLIED OCEAN RESEARCH | 2003年 / 25卷 / 06期
关键词：
abnormal waves; Gaussian process; skewness;
D O I：
10.1016/j.apor.2004.02.005
中图分类号：
P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
A data set of storm wave records from the North Sea is analysed. Using current definitions of abnormal waves, eight of the largest wind waves are defined as abnormal waves. Twenty-four of the largest waves in time series, with a height larger than 10 m and with big vertical asymmetry are chosen for further analysis. Their individual characteristics are investigated and related to the global sea state characteristics. A comparison between measured data, second-order theory predictions and offshore basin data is made. The results for the chosen waves do not coincide with predictions of second-order theory. Considering that wind wave is second- and third-order non-linear, a new relationship between skewness and kurtosis is proposed for the sea states in which extremely asymmetric large waves have occurred. Another relationship between kurtosis and abnormality index of maximum waves is proposed too. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：337 / 344
页数：8
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