Required test durations for converged short-term wave and impact extreme value statistics — Part 1: Ferry dataset

For the design of maritime structures in waves, extreme values responses such as motions and wave impact loads are required. Waves wave-induced stochastic, so should always be related to a probability. This information is not easy obtain for strongly non-linear forces. Usually class rules or direct assessment via experiments numerical simulations applied design. brings up questions convergence values: how long do we need test order converged statistics target duration? Or, vice versa: given testing data, what uncertainty associated statistics? Often simulation duration cut ‘seeds’ ‘realisations’, with an exposure one three hours based on typical steady environmental condition at sea, time that ship sails single course. The required number seeds results depends type structure response, duration, desired probability level. present study provides guidelines most probable maximum (MPM) crest heights MPM green water forces ferry. Long were done gain insight into seeds, effect fitting. paper presents part 1 this study; 2 [1] similar wave-in-deck stationary deck box.