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Calculation of restoring moment in ship roll motion through numerical simulation


Kianejad, SS and Enshaei, H and Duffy, J and Ansarifard, N, Calculation of restoring moment in ship roll motion through numerical simulation, Proceedings of the 13th International Conference on the Stability of Ships and Ocean Vehicles (STAB 2018), 16-21 September 2018, Kobe, Japan, pp. 429-442. (2018) [Refereed Conference Paper]


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Copyright 2018 the authors

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Accurate calculation of restoring moment, virtual mass moment of inertia and damping moment increases accuracy of a ship’s dynamic stability simulation. The current methods of approximating the roll restoring moment are based on hydrostatic calculations. These methods overlook dynamic conditions and the effects of pressure distribution around the body. In the current study, a CFD approach is adopted based on a harmonic excited roll motion method to investigate roll motion characteristics and calculate the restoring moment in dynamic conditions. This investigation considers multiple degrees of freedom (DOF) at different Froude numbers, bare-hull and fully appended conditions. The results show that the restoring moment in dynamic condition is larger than static condition.

Item Details

Item Type:Refereed Conference Paper
Keywords:restoring movement, damping moment, weight distribution, VCG, roll moment of inertia, CFD, harmonic excited roll motion
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Transport
Objective Group:Water transport
Objective Field:International sea freight transport (excl. live animals, food products and liquefied gas)
UTAS Author:Kianejad, SS (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:128675
Year Published:2018
Deposited By:Seafaring and Maritime Operations
Deposited On:2018-10-05
Last Modified:2019-03-25
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