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Publications
Santos, T.A. and Guedes Soares, C. (2003), “Investigation into the Effects of Shallow Water on Deck on Ship Motions”, Proceedings of the 8th International Conference on the Stability of Ships and Ocean Vehicles (STAB´03), 15-19 September, Madrid, Spain
The capsizing of fishing vessels and offshore supply vessels with trapped water on deck and of passenger ro-ro ships with water accumulated in the main vehicle deck, has motivated a considerable amount of research on the dynamic behaviour of ships with considerable amounts of water on board. A number of different approaches (experimental or theoretical-numerical) to study the coupled dynamics of the ship and water have been tried, leading to the conclusion that the problem is very complex, demands considerable experimental or computational time and requires further research.
This paper presents a numerical study in the time domain of the behavior of ships with water on deck or water inside an enclosed vehicle deck. The water on deck is modeled using shallow water theory, which allows for the calculation of the forces that act on the ship. The differential equations describing the ship motions are then solved in the time domain taking in consideration these forces. Numerical results of this theoretical approach, regarding the motions of a tanker comprising a compartment partially filled with shallow water, are compared with experimental results available in the literature. The same theoretical approach is used to simulate the behavior of a passenger ro-ro ship with constant amounts of water inside the main vehicle deck. The results are discussed and conclusions are drawn.
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