A new hybrid method for the time-domain nonlinear simulation of the hydroelastic load effects and the POT (peak over threshold) method for the calculation of the short-term extreme responses are briefly described and applied to a flexible SL-7 class containership and a flexible LNG (liquefied natural gas) ship. Three stiffness levels, three stiffness distributions and three modal damping ratios are used to study the influence of the hull flexibility and structural damping on the short-term prediction of extreme vertical hydroelastic load effects. The results give justification for some simplified treatment of the first vertical flexible mode in early design stage when structural details are not available.
Sensitivity of extreme hydroelastic load effects to changes in ship hull stiffness and structural damping
Einfluss extremer hydroelastischer Belastungseinwirkungen auf Veränderungen der Veränderung der Schiffskörpersteifigkeit und strukturelle Dämpfung
Ocean Engineering ; 34 , 11-12 ; 1745-1756
2007
12 Seiten, 11 Quellen
Article (Journal)
English
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