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An experimental study of ship motions during replenishment at sea operations between a supply vessel and a landing helicopter dock

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Mathew, J, Sgarioto, D, Duffy, JT ORCID: 0000-0003-3484-1345, MacFarlane, GJ ORCID: 0000-0002-0518-430X, Denehy, S ORCID: 0000-0003-2038-776X, Norman, J, Cameron, A and Eutick, N 2018 , 'An experimental study of ship motions during replenishment at sea operations between a supply vessel and a landing helicopter dock' , International Journal of Maritime Engineering, vol. 160, no. A2 , pp. 97-108 , doi: 10.3940/rina.ijme.2018.a2.427.

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Abstract

Hydrodynamic interactions during Replenishment at Sea (RAS) operations can lead to large ship motions and make itdifficult for vessels to maintain station during the operation. A research program has been established which aims tovalidate numerical seakeeping tools to enable the development of enhanced operator guidance for RAS. This paperpresents analysis of the first phase of scale model experiments and focuses on the influence that both the lateral andlongitudinal separations between two vessels have on the interactions during RAS. The experiments are conducted inregular head seas on a Landing Helicopter Dock (LHD) and a Supply Vessel (SV) in intermediate water depth. The SVis shorter than the LHD by approximately 17%, but due to its larger block coefficient, it displaces almost 16% more thanthe LHD. Generally, the motions of the SV were larger than the LHD. It was found that hydrodynamic interactions canlead to large SV roll motions in head seas. Directions for future work are provided.

Item Type: Article
Authors/Creators:Mathew, J and Sgarioto, D and Duffy, JT and MacFarlane, GJ and Denehy, S and Norman, J and Cameron, A and Eutick, N
Keywords: Replenishment at sea, ship interaction, Model scale experiment
Journal or Publication Title: International Journal of Maritime Engineering
Publisher: The Royal Institution of Naval Architects
ISSN: 1479-8751
DOI / ID Number: 10.3940/rina.ijme.2018.a2.427
Copyright Information:

©2018: The Royal Institution of Naval Architects

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