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Effect of Directional Spreading and Spectral Bandwidth on the Nonlinearity of the Irregular Waves
| Content Provider | Semantic Scholar |
|---|---|
| Author | Prevosto, Marc |
| Copyright Year | 1998 |
| Abstract | Wherever one stands, deep water, intermediate or shallow water, in extreme conditions the nonlinearity in the wave kinematics is large and has a strong influence on the design parameters. Simple models of the wave kinematics have been studied based on hypotheses of narrowband and unidirectionality. Obviously a real sea is neither narrowbanded nor unidirectional and the width of the spectral density and the directional spreading influence the nonlinear characteristics of the waves (skewness, asymmetries,.). A second order directional irregular wave model is used to simulate time series of the free surface elevation. Based on a large simulated data base, a parametric study of the influence of the spectral width and directional spreading is led on several wave characteristics sensitive to nonlinearities (skewness, wave and crest heights distributions, steepness of maximum crest). Three typical situations are analysed which correspond to extreme situations in long and short fetch wind sea. The validity of the simplified assumptions of narrowband and unidirectionality is then discussed. |
| Starting Page | 119 |
| Ending Page | 123 |
| Page Count | 5 |
| File Format | PDF HTM / HTML |
| Volume Number | 3 |
| Alternate Webpage(s) | http://www.ifremer.fr/web-com/mpre/isope98/isope98.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
