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Calculation of ship roll hydrodynamic coefficients in regular beam waves


Kianejad, S and Enshaei, H and Duffy, J and Ansarifard, N, Calculation of ship roll hydrodynamic coefficients in regular beam waves, Ocean Engineering, 203 Article 107225. ISSN 0029-8018 (2020) [Refereed Article]

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© 2020 Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.oceaneng.2020.107225


Simulation of a ship’s roll motion through equation-based approaches requires restoring moment, added mass moment of inertia and damping coefficients. Accurate estimation of these coefficients enhances the prediction of ship roll response at a resonance condition. However, the magnitude of these coefficients in regular beam seas and close to a resonance condition is unknown. The present study adopts numerical and experimental simulations to investigate the effects of different wave heights and wave frequencies on ship motion characteristics. The motion characteristics results from numerical simulations are compared against experimental measurements, and a good correlation is achieved. The restoring moment in dynamic conditions is calculated and compared to the hydrostatic restoring moment. The dynamic restoring moment is greater than the hydrostatic restoring moment for some wave frequencies and smaller for other wave frequencies. The magnitudes of roll damping and added mass moment of inertia coefficients are calculated at different wave heights and frequencies, and the results yield that there is quite a nonlinear relationship between the roll hydrodynamic coefficients and roll motion characteristics.

Item Details

Item Type:Refereed Article
Keywords:motion characteristics, sdded mass moment of inertia, damping coefficient, Restoring moment, resonance, CFD
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Naval architecture
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Kianejad, S (Mr Seyedsadreddin Kianejadtejenaki)
UTAS Author:Enshaei, H (Dr Hossein Enshaei)
UTAS Author:Duffy, J (Associate Professor Jonathan Duffy)
UTAS Author:Ansarifard, N (Ms Nazanin Ansarifard)
ID Code:137921
Year Published:2020
Web of Science® Times Cited:7
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2020-03-13
Last Modified:2021-06-07

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