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Prediction of Slamming Behaviour of Monohull and Multihull Forms using Smoothed Particle Hydrodymamics

Citation

Rafieshahraki, J and Penesis, I and Thomas, G and Davis, MR and Whelan, JR, Prediction of Slamming Behaviour of Monohull and Multihull Forms using Smoothed Particle Hydrodymamics, HSMV 2011 Conference Proceedings, 25 - 27 May 2011, Naples, Italy, pp. 1-10. ISBN 978-88-906112-0-9 (2011) [Refereed Conference Paper]


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Copyright 2011 the Authors

Official URL: http://www.rina.org.uk/HSMV2011.html

Abstract

High-speed catamarans are increasingly being used for transportation in both defence and commercial purposes due to their advantages in fuel efficiency, speed and flexible mission applicability. Improving their seakeeping behaviour to reduce discomfort as well as keeping the structure as light as possible are two of the major issues naval architects are extensively investigating. The impact of the bow into the water when operating in large waves, better known as slamming, is a phenomenon which can cause serious damage to the structure as well as reducing passenger comfort in high-speed catamarans. Therefore an understanding of this phenomenon is crucial, as is the development of a method for accurately predicting the slam load magnitude. Model wedge water-entry experiments, CFD, mathematical and empirical formulations are conventional methods currently being employed to investigate slamming and predict drop velocity, accelerations and pressure profiles on the hull surface. More recently, the Smoothed Particle Hydrodynamics (SPH) technique has been applied to simulate wedge water-entry problems due to its advantages in capturing rapid and large deflections in fluids. In this work, SPH has been successfully used to simulate water-entry of a wedge in two-dimensions. Also, the effect of important parameters such as artificial viscosity and numberical speed of sound are investigated and comparisons with experimental results are presented. A wedge with side plates has been simulated as a simplified representation of a catamaran bow section with centrebow.

Item Details

Item Type:Refereed Conference Paper
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
Author:Rafieshahraki, J (Mr Jalal Rafieshahraki)
Author:Penesis, I (Associate Professor Irene Penesis)
Author:Thomas, G (Professor Giles Thomas)
Author:Davis, MR (Professor Michael Davis)
ID Code:71692
Year Published:2011
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2011-08-01
Last Modified:2014-11-28
Downloads:16 View Download Statistics

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