Vessels in the ocean-going fishing fleet are in general operating in almost all weather conditions. This includes operation in high sea-states which may lead to large amplitude ship motions, depending on the seakeeping characteristics of the vessel. Wave-induced ship motions are important factors for the safety and well-being of fishermen at work. Generally, potential flow theory overpredicts wave-induced roll motion amplitudes for conventional ship hulls. This is due to the presence of viscous damping effects in reality. Large amplitude roll motion of ships can be a real problem if no anti-rolling devices (e.g. bilge keels, anti-rolling tanks or roll-damping fins) are installed, as the roll damping coefficient of a ship is the limiting factor for the resonant roll motion amplitudes. The different components of roll damping for a ship at forward speed were investigated by Ikeda et al. [1], [2] and [3] and updated guidelines for numerical estimation of roll damping have been presented by the International Towing Tank Conference [4], where a component discrete type method for estimation of the damping is suggested. The different roll-damping components of Ikeda et al. has been complemented by skeg damping for smooth hulls [5]. This paper presents comparison between model experiments and the numerical results obtained from the guidelines [4] where the effects of bilge-keels and skeg are isolated.
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ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2015
St. John’s, Newfoundland, Canada
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5659-8
PROCEEDINGS PAPER
Modelling of Roll Damping Effects for a Fishing Vessel With Forward Speed
K. G. Aarsæther,
K. G. Aarsæther
SINTEF Fisheries and Aquaculture, Trondheim, Norway
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D. Kristiansen,
D. Kristiansen
SINTEF Fisheries and Aquaculture, Trondheim, Norway
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B. Su,
B. Su
SINTEF Fisheries and Aquaculture, Trondheim, Norway
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C. Lugni
C. Lugni
CNR-INSEAN, Rome, Italy
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K. G. Aarsæther
SINTEF Fisheries and Aquaculture, Trondheim, Norway
D. Kristiansen
SINTEF Fisheries and Aquaculture, Trondheim, Norway
B. Su
SINTEF Fisheries and Aquaculture, Trondheim, Norway
C. Lugni
CNR-INSEAN, Rome, Italy
Paper No:
OMAE2015-41856, V011T12A049; 10 pages
Published Online:
October 21, 2015
Citation
Aarsæther, KG, Kristiansen, D, Su, B, & Lugni, C. "Modelling of Roll Damping Effects for a Fishing Vessel With Forward Speed." Proceedings of the ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. Volume 11: Prof. Robert F. Beck Honoring Symposium on Marine Hydrodynamics. St. John’s, Newfoundland, Canada. May 31–June 5, 2015. V011T12A049. ASME. https://doi.org/10.1115/OMAE2015-41856
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