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Safe tug operations during ship-assist manoeuvres

Jayarathne, N, Ranmuthugala, D ORCID: 0000-0001-8864-2064 and Leong, Z ORCID: 0000-0002-0644-1822 2019 , 'Safe tug operations during ship-assist manoeuvres' , Journal of Navigation, vol. 72 , 813–831 , doi: 10.1017/S0373463318001121.

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Abstract

The hydrodynamic interaction effects on a tug operating in close proximity to a larger vesselcan result in dangerous situations for the tug. To date most studies have focussed on the interaction effects between the vessels when they are operating in parallel, which represent only one of many practical ship-assist manoeuvres. It is therefore necessary to investigate a wide range of tug-ship combinations to obtain a detailed understanding of these effects. This paper discusses the hydrodynamic interaction effects on a tug operating at various relative positions and drift angles to a larger ship, both moving together at the same forward speed. The hydrodynamic effects were determined using Computational Fluid Dynamics (CFD) simulations that were validated using captive model test data. The range of manoeuvres discussed in this paper provides a comprehensive overview of the hydrodynamic interaction effects on a tug enabling tug operatorsto identify safe operating envelopes for their vessels.

Item Type: Article
Authors/Creators:Jayarathne, N and Ranmuthugala, D and Leong, Z
Keywords: tug, interaction, tug-ship
Journal or Publication Title: Journal of Navigation
Publisher: Cambridge Univ Press
ISSN: 0373-4633
DOI / ID Number: 10.1017/S0373463318001121
Copyright Information:

Copyright 2019 The Royal Institute of Navigation

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