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Prediction of roll ...
Prediction of roll motion using fully nonlinear potential flow and ikeda’s method
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- Alexandersson, Martin (author)
- RISE,Maritima avdelningen,Chalmers University of Technology, Sweden,SSPA,Chalmers tekniska högskola,SSPA Sweden AB
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- Kjellberg, Martin (author)
- RISE,Maritima avdelningen,SSPA,SSPA Sweden AB
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- Mao, Wengang, 1980 (author)
- Chalmers University of Technology, Sweden,Chalmers tekniska högskola
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- Ringsberg, Jonas, 1971 (author)
- Chalmers University of Technology, Sweden,Chalmers tekniska högskola
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(creator_code:org_t)
- International Society of Offshore and Polar Engineers, 2021
- 2021
- English.
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In: Proceedings of the International Offshore and Polar Engineering Conference. - : International Society of Offshore and Polar Engineers. - 1098-6189 .- 1555-1792. - 9781880653821 ; , s. 1670-1679
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Abstract
Subject headings
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- Getting the best possible accuracy with the lowest possible computational cost is an important factor in the early design stage of ships. Potential flow-based analysis presents such a solution for seakeeping analyses. The accuracy of roll motion in potential flow is however not so good, due to the large influence from vicsous roll damping, which is missing in these calculations. This paper proposes a hybrid method, as a solution to this problem, where the viscous roll damping from Ikeda’s semi-empirical method is injected into an existing 3D unsteady fully nonlinear potential flow (FNPF) method. The hybrid method is investigated using roll decay tests with the KVLCC2 test case. This investigation shows that the accuracy of simulated roll motions is significantly improved and also shows good agreement with the corresponding roll decay model tests.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Farkostteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Vehicle Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Keyword
- Boundary element methods
- Fully nonlinear potential flow (FNPF)
- Ikeda’s method
- KVLCC2
- Roll-damping
- Roll-decay
- Damping
- Potential flow
- Rolls (machine components)
- Computational costs
- Early design stages
- Flow-based analysis
- Fully nonlinear potential flow
- Hybrid method
- Roll damping
- Roll motions
- Semi-empirical methods
- Arctic engineering
Publication and Content Type
- ref (subject category)
- kon (subject category)
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