File(s) under permanent embargo
Estimation of torsional and global loads for a wave-piercing high-speed catamaran at full-scale in irregular bow quartering seas using CFD simulation
journal contribution
posted on 2023-05-21, 14:54 authored by Islam Almallah, Jason Ali-LavroffJason Ali-Lavroff, Damien HollowayDamien Holloway, Michael DavisMichael DavisCatamarans experience more types of global load than monohulls, these include pitch connecting moment, transverse bending moment, and split force. High-speed catamarans are widely used for passenger transportation but as the speed and size increase the severity of loads rises due to slam induced effects. In this study, full-scale CFD simulations are undertaken to investigate the loads acting on a 98m Incat wave-piercer catamaran (Hull 061) HSV2 Swift. Simulations are performed for conditions of a selected sea trial run in bow quartering seas at 20 knots forward speed undertaken by the Naval Surface Warfare Center, Carderock Division (NSWCCD), enabling comparisons and validation. In order to estimate internal global loads at different sections of the vessel, rigid body dynamics is applied based on the hydrodynamic and inertia forces. Those internal loads include longitudinal bending moment (LBM), pitch connecting moment (PCM), torsional moment (TorM), transverse bending moment (TBM), split force and prying moment. The estimated and measured global loads are also compared with design loads limits provided by DNV GL rules, and peak values of pitch and roll accelerations corresponding to each slam load are determined at the same wave height and wave period as the sea trial. The application of CFD to simulate sea trials runs in oblique seas is shown to provide a reliable estimation of slam induced loads for application in early design stages.
Funding
Australian Research Council
Incat Tasmania Pty Ltd
History
Publication title
Ocean EngineeringVolume
266Issue
Part 4Article number
113006Number
113006Pagination
1-19ISSN
0029-8018Department/School
School of EngineeringPublisher
Elsevier LtdPlace of publication
United KingdomRights statement
© 2022 Elsevier Ltd.Repository Status
- Restricted