Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ijnonlinmec.2004.02.013
Title: Non-linear frequency-domain analysis of jack-up platforms
Authors: Zheng, X.Y. 
Liaw, C.Y. 
Keywords: Correlation function
Cumulant
Cumulant spectrum
FFT
Non-Gaussian
Power spectrum
Price's theorem
Spatial correlation
Issue Date: Nov-2004
Source: Zheng, X.Y., Liaw, C.Y. (2004-11). Non-linear frequency-domain analysis of jack-up platforms. International Journal of Non-Linear Mechanics 39 (9) : 1519-1534. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijnonlinmec.2004.02.013
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.
Source Title: International Journal of Non-Linear Mechanics
URI: http://scholarbank.nus.edu.sg/handle/10635/74263
ISSN: 00207462
DOI: 10.1016/j.ijnonlinmec.2004.02.013
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