Fatigue assessment in FPSO mooring design using moment based Hermit Approximation
Author Huijsmans, R.H.M., Adegeest, L.J.M.
Title Fatigue assessment in FPSO mooring design using moment based Hermit Approximation
Conference/Journal Offshore Mechanics and Arctic Engineering (OMAE), Lisbon, Portugal
Paper no. OMAE1998-1450
Month June
Year 1998

Abstract
Hrrruite models are verified to describe analytically thr, statistics of nonlinear responses based on the r+ sponsc mpan, standard deviat,ion, skewness and kur- t,osis. Conlparison are made between the numerical fittings and data obtained from a nonlinear mooring simulation programme obtained for moored 250 Kdwt FPSO. Good agreements are obtained down to the lowest lrvrls of probability in the simulations. This investigation is an intermediate step in the devel- opment of id complete method to calculate the stat,is- t.ics of nonlinear mooring loads loads in arbitrary wave spectra. Since the Hermite models turn out to give vt~y ,Lcc:urate results, the main attention should be arlclressed to the calculation of the statistical response nwnlwts in nonlinear conditions.

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