3D Simulation of Wave Slamming on a Horizontal Deck Using WCSPH

Abstract

Wave slamming induces extremely high loads to offshore structures and ships whether, due to wave impact on the deck of offshore structure or due to moving bodies such as ships and air crafts hitting the water surface. During slamming wave impact, a localized high pressure will generate at the point of incidence. This very high pressure experienced by the bottom of deck plate is difficult to predict. In this paper, numerical simulation of wave slamming on offshore platform deck structures in incident waves is carried out using weakly compressible smoothed particle hydrodynamics (WCSPH). Pressure values in SPH are very sensitive to errors in the treatment of boundary conditions. Hence, two types of boundary conditions are tried for this slamming problem: repulsive and dynamic boundary conditions. The pressure values on the center regions of the structure are observed from the SPH generated pressure contour lines, to be larger than the values on the surrounding parts.