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Modelling the manoeuvring behaviour of an ULCS in coastal waves
In: Ocean Engineering. Pergamon: Elmsford. ISSN 0029-8018; e-ISSN 1873-5258
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| Auteurs | | Top |
- Tello Ruiz, M.Á.
- Mansuy, M.
- Delefortrie, G.
- Vantorre, M.
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| Abstract |
Understanding the ship manoeuvring behaviour in waves is of major interest to avoid ship responses which can lead to hazardous scenarios. Waves may impair the ship's manoeuvrability by inducing hull forces and moments, and by changing the propeller and rudder performance. These are fundamental problems which require further attention.
The present work aims to provide a better insight on the problem of manoeuvring in waves by investigating the change of the hull, propeller and rudder hydrodynamic behaviour with respect to calm water. Coastal waves and finite water depths, representative of the Belgian coastal zone of the North Sea, are chosen for the present study. These correspond to scenarios where Ultra Large Container Ships (ULCS) manoeuvre in waves and shallow water. The study includes experiments conducted with a scale model of an ULCS in the Towing Tank for Manoeuvres in Confined Water at Flanders Hydraulics Research (in cooperation with Ghent University). Different combinations of ship forward speeds, wave amplitudes and periods, drift angles, propeller rates and rudder angles are considered. Moreover, numerical results for the wave induced forces, moments, and motions have been computed with the software package Hydrostar and the results are compared with the experiments to evaluate their accuracy. |
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