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Slam load estimation for high-speed catamarans in irregular head seas by full-scale computational fluid dynamics

Citation

Almallah, I and Ali-Lavroff, J and Holloway, DS and Davis, MR, Slam load estimation for high-speed catamarans in irregular head seas by full-scale computational fluid dynamics, Ocean Engineering, 234 Article 109160. ISSN 0029-8018 (2021) [Refereed Article]

Copyright Statement

Copyright 2021 Elsevier Ltd.

DOI: doi:10.1016/j.oceaneng.2021.109160

Abstract

Global loads acting on high-speed wave-piercing catamarans are investigated using computational fluid dynamics (CFD). Catamaran vessels are subjected to load cases that are not present on mono-hull vessels, such as transverse bending moment, pitch connecting moment and splitting force. As the speed and size of a catamaran increases the severity of loads rises with slam induced effects. Full-scale CFD simulation is undertaken to investigate the pressure distributions and resultant global loads acting on the 98 m INCAT wave-piercer catamaran HSV2 Swift, validated against sea trial tests. Rigid body dynamics are then applied to estimate the internal loads at different sections of the vessel based on the relative hydrodynamic and inertial force distributions. The estimated global loads are then checked according to DNV GL rules by comparing "design load limits". Global loads are estimated for the 98 m INCAT HSV2 Swift catamaran in headseas at a forward speed of 20 knots. Splitting forces are found to have a longitudinal distribution along the catamaran hull, which causes prying moments. Peak values for LBM are examined relative to corresponding instantaneous wave height prior to the slam event. In addition, it is found that pitch acceleration has a linear correlation with LBM slam loads.

Item Details

Item Type:Refereed Article
Keywords:slamming, high-speed catamaran, sea trials, computational fluid dynamics (CFD), wave-piercing catamaran, full-scale, global dynamic wave loads
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Mechanical engineering not elsewhere classified
Objective Division:Transport
Objective Group:Water transport
Objective Field:International passenger water transport (e.g. passenger ships)
UTAS Author:Almallah, I (Mr Islam Almallah)
UTAS Author:Ali-Lavroff, J (Dr Jason Ali-Lavroff)
UTAS Author:Holloway, DS (Associate Professor Damien Holloway)
UTAS Author:Davis, MR (Professor Michael Davis)
ID Code:145211
Year Published:2021
Funding Support:Australian Research Council (LP170100555)
Deposited By:Engineering
Deposited On:2021-07-12
Last Modified:2021-09-01
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