Analysis of abnormal wave records by the Hilbert-Huang transform method

被引：0
|
作者：
Veltcheva, Albena D. [1 ,2 ]
Guedes Soares, C. [3 ]
机构：
[1] Institute of Oceanology, Bulgarian Academy of Sciences, Varna, Bulgaria
[2] ECOH Corporation, Yokohama, Japan
[3] Unit of Marine Technology and Engineering, Technical University of Lisbon, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
来源：
Journal of Atmospheric and Oceanic Technology | 2007年 / 24卷 / 09期
关键词：
The Hilbert-Huang transform method is used in this work to analyze wave records from the North Sea; which include abnormal waves. The analysis of the characteristics of abnormal waves is based on the local decomposition of wave data by using the intrinsic mode functions. The variations of amplitude of intrinsic mode functions around the time of the occurrence of abnormal waves are examined in order to investigate the contribution of different intrinsic mode functions on the abnormal waves' profile; in an attempt to find relationships between them. The changes of local frequency of each intrinsic mode function in the vicinity of abnormal waves are examined. The essential nonlinearity of abnormal waves is considered as intrawave frequency modulation; a variation of the instantaneous frequency within one oscillation cycle. The Hilbert spectrum is used as a detector of abnormal waves. © 2007 American Meteorological Society;
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Journal article (JA)
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页码：1678 / 1689
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