First-year sea ice ridges are a major concern for structures operating in the Arctic and will in many cases give the design mooring load. In this paper, a moored conical floater, somewhat similar to the well-known Kulluk, is studied in first-year ridges. The study is based on model tests performed at HSVA in several ridges with different properties. Mooring forces and floater response resulting from interaction with different ridges were compared with respect to ridge properties, ridge behaviour and simulated ice management. Clearance of accumulated rubble upstream the structure was the dominating physical process in the ridge-structure interaction. Accumulation of rubble caused large mooring forces. The amount of accumulated rubble depended on the ridge cross-sectional area, thus the mooring forces increased with ridge cross-sectional area. Large mooring forces were also experienced after the initial position of the ridge was passed due to difficulties with clearing of accumulated rubble.
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ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2009
Honolulu, Hawaii, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4345-1
PROCEEDINGS PAPER
A Moored Arctic Floater in First-Year Sea Ice Ridges Available to Purchase
Oddgeir Dalane,
Oddgeir Dalane
Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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Jan Vidar Aarsnes
Jan Vidar Aarsnes
Sevan Marine ASA, Arendal, Norway
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Oddgeir Dalane
Norwegian University of Science and Technology (NTNU), Trondheim, Norway
Vegard Aksnes
NTNU, Trondheim, Norway
Sveinung Lo̸set
NTNU, Trondheim, Norway
Jan Vidar Aarsnes
Sevan Marine ASA, Arendal, Norway
Paper No:
OMAE2009-79945, pp. 159-167; 9 pages
Published Online:
February 16, 2010
Citation
Dalane, O, Aksnes, V, Lo̸set, S, & Aarsnes, JV. "A Moored Arctic Floater in First-Year Sea Ice Ridges." Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV. Honolulu, Hawaii, USA. May 31–June 5, 2009. pp. 159-167. ASME. https://doi.org/10.1115/OMAE2009-79945
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