Violent seakeeping problem: an application to a patrol ship

This work is part of an ongoing experimental and numerical research activity on water-on-deck phenomena. Previous steps of the investigation have been documented in Greco et al. (2007) and Greco et al. (2008). Experimentally, the interactions between regular incoming waves and a patrol ship model, without forward motion and free in heave and pitch, have been studied (see figure 1). The incoming wavelength and steepness were systematically varied and the occurrence of water-on-deck phenomena was recorded. Rigid ship motions, pressure on the deck, pressure and force on the deck superstructure, were measured. The flow evolution along the deck was recorded with a digital video camera.Numerically, the adopted strategy couples the rigid-ship motions with the water flow along the deck. The seakeeping problem is studied with a 3D weakly-nonlinear potential flow solver based on the weak-scatter hypothesis.