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

Shabani, B; Lavroff, J; Holloway, D; Michael, D; Thomas, G; (2021) 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. 10.1080/17445302.2019.1708043. Green open access

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Abstract

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 18–105% 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.

Type: Article
Title: Centre bow and wet-deck design for motion and load reductions in wave piercing catamarans at medium speed
Open access status: An open access version is available from UCL Discovery
DOI: 10.1080/17445302.2019.1708043
Publisher version: https://doi.org/10.1080/17445302.2019.1708043
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Wave-piercing catamaran, hydroelastic segmented model, centre bow, relative motions, slamming, vertical bending moments
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10088174
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