Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8059376 | Applied Ocean Research | 2016 | 9 Pages |
Abstract
The wave groups are studied by both conventional wave analysis methods and by the non-stationary Hilbert Huang Transform (HHT) method. Full-scale wave records containing abnormal waves are used. Instantaneous quantities, such as envelope, phase and frequency, are adopted to study the wave grouping. A refined definition of wave group is proposed considering that the wave process is simultaneously amplitude and frequency modulated. The validation of the proposed definition is conducted by analysis of numerical simulation data. Group parameters are proposed based on the time-frequency distribution of energy. An attempt is made to find the relationship between the characteristics of abnormal waves and the group characteristics.
Keywords
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Physical Sciences and Engineering
Engineering
Ocean Engineering
Authors
Albena Veltcheva, C. Guedes Soares,