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The effect of centre bow and wet-deck geometry on wet-deck slamming loads and vertical bending moments of wave-piercing catamarans

Shabani, B, Lavroff, J ORCID: 0000-0001-5262-8666, Holloway, DS ORCID: 0000-0001-9537-2744, Davis, MR and Thomas, GA 2018 , 'The effect of centre bow and wet-deck geometry on wet-deck slamming loads and vertical bending moments of wave-piercing catamarans' , Ocean Engineering, vol. 169, no. 1 , pp. 401-417 , doi: 10.1016/j.oceaneng.2018.09.028.

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Abstract

An experimental study was performed to determine the influence of centre bow length and tunnel height on the magnitude of the wave slamming loads and bending moments acting on a 112 m Incat wave-piercer catamaran vessel. A 2.5 m hydroelastic segmented catamaran model was tested in regular head sea waves at a high model speed in multiple test series, whilst five centre bow (CB) and wet-deck configurations were considered, designated here as the parent, low, high, long and short CBs. The model global motions, centre bow slam loads, accelerations, and slam induced vertical bending moments of the catamaran model in waves were measured. It was found that the slamming force, the centre bow entry force and slam induced bending moment all increase as the centre bow length increases. Increasing the wet-deck height increased the motions but reduced the maximum slam load in moderate waves. It was seen that the short CB was the best design for the alleviation of slam loads. The high CB was the second best choice for operation in moderate waves but it was the worst configuration in terms of heave and pitch motions among various CB configurations tested.

Item Type: Article
Authors/Creators:Shabani, B and Lavroff, J and Holloway, DS and Davis, MR and Thomas, GA
Keywords: catamaran, hydroelastic segmented model, wet-deck slamming, centre bow, relative motion, vertical bending moment
Journal or Publication Title: Ocean Engineering
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 0029-8018
DOI / ID Number: 10.1016/j.oceaneng.2018.09.028
Copyright Information:

Copyright 2018 Elsevier Ltd.

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