We report a new approach to model the frequency-direction spectrum, in which the frequency-direction spectra from measurements or hindcast studies are fitted simultaneously in two dimensions, frequency and direction. Depending on the amount of wind forcing on the partition, either a unimodal (swell) or bimodal (wind-sea) wave spreading function is adopted together with the spectral form which best fits the frequency spectrum. This paper describes the new method and presents the results on a measured dataset.
A Generic Method to Model Frequency-Direction Wave Spectra for FPSO Motions
van Zutphen, HJ, Jonathan, P, & Ewans, KC. "A Generic Method to Model Frequency-Direction Wave Spectra for FPSO Motions." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 1: Offshore Technology. Estoril, Portugal. June 15–20, 2008. pp. 463-473. ASME. https://doi.org/10.1115/OMAE2008-57481
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