Bottom slamming for a Very Large Floating Structure: coupled global and slamming analysis

An iterative Domain-Decomposition(DD)strategy is developed to examine the coupling between the global motions of aVery Large Floating Structure(VLFS)and bottom-slamming events.It combines(a)thelinear-global analysis and (b) thefully-nonlinear description document ed in Greco et al.[2008].Bottom slamming for a Very Large Floating Structure: Uncoupled global and slamming analyses. Journal of Fluids and Structures,this issue,doi:10.1016/j.jfluidstructs.2008.09.002]. WithintheDD,(b)isusedinaninnerdomaininthewave-sideregionoftheVLFS,where bottom-slamming canoccur.The initial and boundary conditions and the body motions are provided by the global analysis (a).The VLFS motions are the ncorrected using the global loads induced by slamming.The latter are obtained through a local analytical solution. Assessment of air-entrapment occurring during slamming is discussed,and a pressure criterion is proposed for slamming without air entrainment to switch from the analytical to the numerical evolution of pressure after the impact phase.Comparison with 2-D experiments shows a promising agreement.