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Investigating ship maneuvers around a floating structure under the influence of a uniform current in deep and calm water Skejic, R.; Breivik, M.; Berg, T.E. (2011). Investigating ship maneuvers around a floating structure under the influence of a uniform current in deep and calm water, in: Pettersen, B. et al. (Ed.) 2nd International Conference on Ship Manoeuvring in Shallow and Confined Water: Ship to Ship Interaction, May 18 - 20, 2011, Trondheim, Norway. pp. 339-350 In: Pettersen, B. et al. (2011). 2nd International Conference on Ship Manoeuvring in Shallow and Confined Water: Ship to Ship Interaction, May 18 - 20, 2011, Trondheim, Norway. Flanders Hydraulics Research/Ghent University/Norwegian Marine Technology Research Institute/Norwegian University of Science and Technology (NTNU)/The Royal Institute of Naval Architects: London. ISBN 978-1-905040-83-4. X, 422 pp., meer

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Beschikbaar in	Auteurs
Waterbouwkundig Laboratorium: Non-open access 223344 [ aanvragen ]
Documenttype: Congresbijdrage

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Auteurs		Top
Skejic, R. Breivik, M. Berg, T.E.

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Abstract

This paper considers the topics of hydrodynamic interaction load effects and ship motion control system designassociated with maneuvering a ship around a floating object such as an offshore cargo storage facility in deep and calmwater under the influence of a uniform current. In particular, the hydrodynamic interaction loads in the time domain areestimated by using generalized Tuck and Newman theory [1]. These loads are estimated within the combined seakeepingand maneuvering model of Skejic and Faltinsen [5, 6] and Skejic [7]. The applicability of the model is discussed from ahydrodynamic point of view and also evaluated through numerical simulations. In addition, a novel ship motion controlsystem is developed to make it possible for a ship to safely maneuver around moored or drifting objects despite beingexposed to significant hydrodynamic interaction effects. The motion control system consists of a guidance system whichinstructs a course control system which subsequently commands the ship rudder to enable circular path following aroundany specified object. Two close-proximity maneuvering scenarios are simulated using a scaled „MARINER‟ ship and ahexagonal prism-shaped cargo storage facility which is stationary or drifting under the influence of a uniform current.The hydrodynamic interaction effects and effectiveness of the maneuvers are then investigated for these scenarios.Finally, aspects concerning the marine inspection operations are discussed from the perspective of navigational safety.

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