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Ship motions in shallow water as the base for a probabilistic approach policy Vantorre, M.; Laforce, E.; Eloot, K.; Richter, J.; Verwilligen, J.; Lataire, E. (2007). Ship motions in shallow water as the base for a probabilistic approach policy, in: (2008). Proceedings of the 27th International Conference on Offschore Mechanics and Arctic Engineering (OMAE 2008), Estoril, Portugal, 15-20 June, 2008. pp. [1-10] In: (2008). Proceedings of the 27th International Conference on Offschore Mechanics and Arctic Engineering (OMAE 2008), Estoril, Portugal, 15-20 June, 2008. American Society of Mechanical Engineers: New York. ISBN 978-0-7918-4823-4. 1 cd-rom pp.

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Beschikbaar in	Auteurs
VLIZ: Open access 141423 [ download pdf ] Waterbouwkundig Laboratorium: Open Repository 264737 [ OWA ]
Documenttype: Congresbijdrage

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Trefwoorden

Motion > Ship motion Water > Shallow water

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Auteurs		Top
Vantorre, M. Laforce, E. Eloot, K., meer	Richter, J. Verwilligen, J., meer Lataire, E.

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Abstract

A calculation tool has been developed for determining tidal windows for deep-drafted ships approaching and leaving the Belgian harbors according to probabilistic criteria. The calculations are based on a database containing response functions for the vertical motions in waves and squat data for a selection of representative ships. The database contains both results of model tests carried out in the Towing tank for maneuvers in shallow water - co-operation Flanders Hydraulics Research & Ghent University in Antwerp (Belgium), as well as calculated values. During the experiments, draft, trim, under keel clearance (7 to 20% of draft) and speed have been varied. The tests were performed in regular waves with lengths which are small compared to ship length, and in wave spectra that are typical for the Belgian coastal area. For given input data (ship characteristics, speed, tide, directional wave spectra, bottom, trajectory, current, departure time), the tool calculates the probability of bottom touch during the transit, so that a tidal window can be determined. Other restrictions, such as penetration into fluid mud layers and current, are taken into account as well.

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