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Wet-deck slamming loads and pressures acting on wave piercing catamarans

Citation

Shabani, B and Lavroff, J and Holloway, DS and Davis, MR and Thomas, GA, Wet-deck slamming loads and pressures acting on wave piercing catamarans, International Shipbuilding Progress, 66, (3) pp. 201-231. ISSN 0020-868X (2019) [Refereed Article]

Copyright Statement

Copyright 2019 IOS Press and the authors

DOI: doi:10.3233/ISP-180247

Abstract

Background:

The wet-deck height and centre bow configuration in wave piercing catamarans are critical design factors which influence slamming occurrence and severity.

Objective:

In this paper, the wet-deck slamming loads and pressures acting on a 112 m catamaran with a centre bow were investigated in regular waves in two wave heights.

Methods:

A 2.5 m hydroelastic model with three alternate configurations of wet-deck vertical clearance was tested at a speed of 2.89 m/s (38 knots full-scale equivalent).

Results:

The results showed that at the instant of slamming the centre bow immersion depth relative to the undisturbed incident wave elevation was less than two thirds of the maximum immersion depth during the wet-deck slam event. The location of maximum slamming pressure was found to be in the range between 77% and 80% of the overall length from the transom. The relationship between the relative velocity at impact and slamming force indicated that slamming loads in the order of the vessel weight can occur for the parent design when the relative velocity at slam is about a quarter of the forward speed.

Conclusions:

Overall, increasing the wet-deck height was more beneficial for reduction of slamming loads and pressures in smaller waves than in large waves.

Item Details

Item Type:Refereed Article
Keywords:wave piercing catamaran, hydroelastic segmented model
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ship and Platform Hydrodynamics
Objective Division:Transport
Objective Group:Water Transport
Objective Field:Passenger Water Transport
UTAS Author:Shabani, B (Mr Babak Shabani)
UTAS Author:Lavroff, J (Dr Jason 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:135103
Year Published:2019
Deposited By:Engineering
Deposited On:2019-09-30
Last Modified:2019-11-05
Downloads:0

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