Publicações

Santos, T.A. e Guedes Soares, C. (2006), “Study of the Dynamics of a Damaged Passenger Ro-Ro Ship”, Proceedings of the 9th International Conference on Stability of Ships and Ocean Vehicles (STAB´06), 25-29 Setembro, Rio de Janeiro, Brasil

This paper describes a numerical model of the motions of damaged ships in a seaway. The model considers the equations of motion of the ship in the time domain and is capable of describing the behaviour of the floodwater inside the ship’s compartments using one of two different methods: a static method in which the free-surface is modelled by a horizontal plane parallel to the mean sea level; a dynamic method in which the floodwater effects are treated as external forces and moments applied to the ship. The second method comprises the solution in the time domain of the shallow water flow equations. The numerical model is then applied to study the behaviour of a flooded passenger ro-ro ship. A number of damage conditions are studied which include the flooding of double-bottoms and main compartments, with the main deck dry. Results of the numerical simulations are presented for calm waters and beam waves, both in the intact and damage conditions. Comparisons with experimental results are presented and the agreement of the results is discussed, with special attention being given to the problem of the interaction between the ship and the floodwater and the occurrence of two-peaked roll response curves in beam seas for the flooded ship. Finally, the main conclusions of the study are drawn and recommendations for further studies are indicated.

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