LONG TERM SPRINGING AND WHIPPING STRESSES IN HIGH SPEED VESSELS

High-speed ships are weight sensitive structures and high strength steel, aluminium or composites are preferred building materials. The use of these materials results in larger hull flexibility than more conventional materials. Therefore, for large fast ships, the lowest natural frequencies of the global hull modes can be relatively low compared to the frequency of wave encounter. In this paper, a parameter study is performed to determine the relative importance of hull flexibility and ship length on the wave-induced springing and whipping response of fast monohull vessels.