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Centre bow and wet-deck design for motion and load reductions in wave piercing catamarans at medium speed


Shabani, B and Lavroff, J and Holloway, DS and Davis, MR and Thomas, GA, Centre bow and wet-deck design for motion and load reductions in wave piercing catamarans at medium speed, Ships and Offshore Structures, 16, (1) pp. 83-99. ISSN 1744-5302 (2019) [Refereed Article]

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2019 Informa UK Limited, trading as Taylor & Francis Group

DOI: doi:10.1080/17445302.2019.1708043


For wave piercing catamarans, the centre bow length and tunnel clearance are important design factors for slamming, passenger comfort and deck diving. This experimental study determined the influence of centre bow (CB) and wet-deck geometry on their motions and loads at reduced speed using five configurations. A 2.5 m hydroelastic segmented catamaran model was tested in regular head seas in wave heights equivalent to 2.7 m, 4.0 m and 5.4 m at full scale. Higher wet-decks had higher vertical accelerations but reduced slamming loads. The greatest peak vertical CB loads ranged between 18105% of the total hull weight. Regression models were obtained for the vertical loads and bending moments. A reduction of speed from 38 knots to 20 knots reduces the maximum slam loads by approximately 30% in regular waves. Considering both low and high speeds, the Short CB was found to be a consistent design for slamming reduction.

Item Details

Item Type:Refereed Article
Keywords:wave-piercing catamaran, hydroelastic segmented model, centre bow, relative motions, slamming, vertical bending moments
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Transport
Objective Group:Water transport
Objective Field:Domestic passenger water transport (e.g. ferries)
UTAS Author:Shabani, B (Dr Babak Shabani)
UTAS Author:Lavroff, J (Dr Jason Ali-Lavroff)
UTAS Author:Holloway, DS (Associate Professor Damien Holloway)
UTAS Author:Davis, MR (Professor Michael Davis)
UTAS Author:Thomas, GA (Professor Giles Thomas)
ID Code:136736
Year Published:2019
Web of Science® Times Cited:1
Deposited By:Engineering
Deposited On:2020-01-16
Last Modified:2021-03-18
Downloads:1 View Download Statistics

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