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Hydrodynamic interaction of two thin ships with rudder in close proximity
Yasukawa, H.; Yoshida, S. (2011). Hydrodynamic interaction of two thin ships with rudder in close proximity, 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. 399-406
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., more
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Document type: Conference paper
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  • Yasukawa, H.
  • Yoshida, S.
Abstract
    The hydrodynamic force characteristics of two Wigley hulls moving side by side in close proximity with steering are investigated experimentally and theoretically. Captive model tests are carried out to measure the hydrodynamic forces acting on two hulls and two rudders with changing lateral clearance between ships, hull drift angle and rudder angle. The experimental results are compared with numerical analysis using the nonlinear lifting surface theory. We found that when a ship moves obliquely to be close to other ship, suction force and bow-in moment act on both ships and become larger with decrease of the lateral clearance between ships. The lifting-surface based calculation method can capture the hydrodynamic force characteristics of two thin ship models with rudder.
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