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Alternative Title
Abstract
The autocorrelation function and higher-order cumulants of the non-Gaussian wave modal force, with a cubic approximation of the Morison drag force and a quartic approximation of the inundation force, are presented. The method utilized is based on Price's theorem for evaluating the associated joint moments of the non-linear wave forces. One- and multi-dimensional fast Fourier transform techniques are employed to obtain the power and higher-order spectra of the wave modal force and structural response. The non-linear frequency-domain analyses of two typical jack-up platforms are carried out using the correlation function based approach, which is numerically much more efficient than either the method based on Volterra-series or time-domain simulation. © 2004 Elsevier Ltd. All rights reserved.
Keywords
Correlation function, Cumulant, Cumulant spectrum, FFT, Non-Gaussian, Power spectrum, Price's theorem, Spatial correlation
Source Title
International Journal of Non-Linear Mechanics
Publisher
Series/Report No.
Collections
Rights
Date
2004-11
DOI
10.1016/j.ijnonlinmec.2004.02.013
Type
Conference Paper