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Systematic model tests on centre bow design for motion and slamming load alleviation in high speed catamarans

Citation

Shabani, B and Holloway, DS and Lavroff, J and Davis, MR and Thomas, GA, Systematic model tests on centre bow design for motion and slamming load alleviation in high speed catamarans, 14th International Conference on Fast Sea Transportation, 27-29 September 2017, Nantes, France, pp. 136-143. (2017) [Non Refereed Conference Paper]


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Abstract

While the unique centre bow of the Incat wave piercing catamaran (WPC) has evolved and improved over successive generations, it is of interest to more systematically evaluate its geometry against a variety of criteria including motions, loads, kinematics and slamming. A 2.5 m hydroelastic model with five alternate configurations of centre bow length and wetdeck vertical clearance was tested in regular waves. Both heave and pitch response amplitudes increased as the wet-deck height increased, while the length of the centre bow had less effect. However, the longer centre bow showed less heave amplitude at the heave resonance. Increasing the length of centre bow, however, consistently increased the slamming load severity, resulting in higher slam-induced bending moments, but the severity of local slamming pressures was not significantly affected. Increase of wet-deck height was more beneficial for reduction of slam loads and vertical bending moments than slam pressure. This suggests that redesigning the cross sectional arch configuration would be a suitable approach for alleviating slam pressure.

Item Details

Item Type:Non Refereed Conference Paper
Keywords:centre bow design, high-speed catamaran, slamming
Research Division:Engineering
Research Group:Mechanical Engineering
Research Field:Mechanical Engineering not elsewhere classified
Objective Division:Transport
Objective Group:Water Transport
Objective Field:Water Transport not elsewhere classified
Author:Shabani, B (Mr Babak Shabani)
Author:Holloway, DS (Dr Damien Holloway)
Author:Lavroff, J (Dr Jason Lavroff)
Author:Davis, MR (Professor Michael Davis)
ID Code:121691
Year Published:2017
Deposited By:Engineering
Deposited On:2017-10-11
Last Modified:2017-10-11
Downloads:0

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