Searching for just a few words should be enough to get started. If you need to make more complex queries, use the tips below to guide you.
Article type: Research Article
Authors: Liut, D. | Mook, D. | Weems, K. | Nayfeh, A.
Affiliations: Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, USA | Ship Technology Division, Science Applications International Corp., Annapolis, USA
Abstract: A general unsteady vortex-lattice technique, called FINS, is developed to model the flowfield around a fin attached to the hull of a moving ship. The fins can have any shape and movable flaps and be at any angle of attack below those where stall and/or cavitation occur. Then a method to combine this model with such existing motion-predicting programs as LAMP or FREDYN is developed. The combined programs, working in concert, can be used to predict the motion of ships with fins attached to the hull in the time domain. Because of the great disparity in the dimensions of the hull and fins, different grid sizes and different time steps are required to produce the same accuracy. Moreover, LAMP and FREDYN are based on surface distributions of sources, whereas FINS is based on a lattice of discrete vortex lines. Consequently, the final combination of the two programs (LAMP and FINS in the present work) is a single program that simultaneously uses distributions of sources and vorticity over grids of vastly differing sizes while using different time steps for the different grids. To provide confidence in the new model of flow over the fins, it is shown in several examples that the numerical and experimental results are in close agreement. In a final example, the program with the combined models is used to predict the motion of a ship in a seaway. The results show a 50% reduction in the computed peak amplitudes of the roll motion of a CG47 cruiser in a random beam sea; the sea state is five.
Journal: International Shipbuilding Progress, vol. 48, no. 1, pp. 19-50, 2001
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
[email protected]
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office [email protected]
Inspirees International (China Office)
Ciyunsi Beili 207(CapitaLand), Bld 1, 7-901
100025, Beijing
China
Free service line: 400 661 8717
Fax: +86 10 8446 7947
[email protected]
For editorial issues, like the status of your submitted paper or proposals, write to [email protected]
如果您在出版方面需要帮助或有任何建, 件至: [email protected]