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Interaction forces in tug operations
Geerts, S.; Vantorre, M.; Eloot, K.; Huijsmans, R.; Fierens, N. (2011). Interaction forces in tug operations, 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. 153-164
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
Keywords
    Forces
    Harbours and waterways > Manoeuvring behaviour > Ship-to-ship interaction
    Interactions
    Physical modelling
Author keywords
    Tug operations; Sleepboothandelingen
Authors  Top 
  • Huijsmans, R.
  • Fierens, N.
Abstract
    An assessment is made of the hydrodynamic interaction forces acting on a tug sailing freely in the vicinity of the bow of a large container vessel. For this purpose, a series of towing tank test have been performed during which the model of an azimuth stern drive tug was towed together with the model of a container carrier. Forces and moments on the tug model were measured for a range of relative positions and drift angles at multiple forward speeds. The model test results were incorporated in a fast-time simulation program to assess the steering action required to keep the tug at a fixed station by controlling the thrust and azimuth angle of both thrusters. Through simulations at different positions at which the towline is passed, an assessment is made of the most suitable position to perform this action.
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