The present paper addresses the seakeeping behavior of a rigid type of floating closed fish cages, with focus on effects of sloshing on the coupled motions and mooring loads. Closed cages have gained much attention recently as a strategy to avoid sea-lice infections in farming of Atlantic salmon. However, closed cages are novel structures and more knowledge is needed on the wave induced motions and coupling effects with sloshing for development of reliable closed cage structures to reduce risk for failure and possible escape of fish. In this paper, dedicated scaled model tests of closed cages in waves are presented and compared with numerical simulations using linear potential theory in frequency domain. The results shows that the influence of sloshing on the rigid body motion is significant. A nonlinear effect of sloshing was observed for a small region of excitation frequencies, where the surge amplitude increased with increasing wave steepness. Mean wave loads were also affected by sloshing. Hence, coupled motions with sloshing is important to consider in design of floating closed rigid fish cages and their mooring system.
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ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
June 17–22, 2018
Madrid, Spain
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5125-8
PROCEEDINGS PAPER
Numerical and Experimental Study on the Seakeeping Behavior of Floating Closed Rigid Fish Cages
David Kristiansen,
David Kristiansen
SINTEF Ocean, Trondheim, Norway
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Pål Lader,
Pål Lader
Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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Per C. Endresen,
Per C. Endresen
SINTEF Ocean, Trondheim, Norway
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Vegard Aksnes
Vegard Aksnes
SINTEF Ocean, Trondheim, Norway
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David Kristiansen
SINTEF Ocean, Trondheim, Norway
Pål Lader
Norwegian University of Science and Technology (NTNU), Trondheim, Norway
Per C. Endresen
SINTEF Ocean, Trondheim, Norway
Vegard Aksnes
SINTEF Ocean, Trondheim, Norway
Paper No:
OMAE2018-77254, V006T05A001; 10 pages
Published Online:
September 25, 2018
Citation
Kristiansen, D, Lader, P, Endresen, PC, & Aksnes, V. "Numerical and Experimental Study on the Seakeeping Behavior of Floating Closed Rigid Fish Cages." Proceedings of the ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. Volume 6: Ocean Space Utilization. Madrid, Spain. June 17–22, 2018. V006T05A001. ASME. https://doi.org/10.1115/OMAE2018-77254
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