Numerical simulation of non-gaussian process of wind waves |
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| Authors: | Liu Xin'an and Huang Peiji |
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| Institution: | First Institute of Oceanography, State Oceanic Administration, Qingdao, China |
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| Abstract: | In this paper further mathematical analysis on "correlation transfer technique" by Polge el al.is carried out,the tenable conditions and the extent of suitability for the said method are proved as well.In consideration of the influence of skewness of the sea surface elevation on spectral shape,a "quasi-correlation transfer techique" is developed by the modification of the simulated target spectrum.Meanwhile,the numerical simulation of the non-Gaussian process of wind waves is carried out in view of the two conditions of the surface elevation probability distribution and the spectrum.By using its simulated results,the influence of skewness of the sea surface elevation on two parameters in the distribution of wave heights (which had been fitted by using the Weibull distribution) is analysed.The "quasi-correlation tranfer technique" is verified and compared with the selection wave data observed in the Jiaozhou Bay in the period of 1980 to 1981.Results make clear that,as far as the statistical distribution of the wave heights and the distribution of the maximum (minimum) values of the sea surface elevation are concerned,the said method is obviously superior to the conventional mothed of the linear wave superposition,and that the simulated results are closet to the observation data. |
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