HYDROELASTIC MODELING OF WET DECK SLAMMING ON MULTIHULL VESSELS

Slamming against the wet deck oi a multihull vessel in head sea waves is studied analytically and numerically. The theoretical slamming mode l is a two-dimensional, asymptotic method valid for snail local angles between the undisturbed water surface and the wet deck in the impact region. The disturbance of the water surface as well as the local hydr oelastic effects in the slamming area are accounted for. The elastic d eflections of the wet deck are expressed in terms of ''dry'' normal mo des. The structural formulation accounts for the shear deformations an d the rotatory inertia effects in the wet deck. The findings show that the slamming loads on the wet deck and the resulting elastic stresses in the wet deck are strongly influenced by the elasticity of the wet deck structure.