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Unsteady effects during resistance tests on a ship model in a towing tank

Doctors, Lawrence J. and Day, Alexander and Clelland, David (2008) Unsteady effects during resistance tests on a ship model in a towing tank. Journal of Ship Research, 52 (4). pp. 263-273. ISSN 0022-4502

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Abstract

It is known that there are oscillations in the wave resistance during the constantvelocity phase of a towing-tank resistance test on a ship model. In this work, the unsteady thin-ship resistance theory has been applied to this case. The results have been compared with experiment data obtained using a towing carriage the velocity history of which can be programmed. It is demonstrated here that generally excellent correlation exists between the theory and the experiments. In particular, one can predict the influence of Froude number, rate of acceleration, and type of smoothing of the acceleration on the characteristics of the oscillations. These characteristics include the amplitude, rate of decay, frequency, and phasing of the oscillations in the curve of wave resistance versus time.

Item type: Article
ID code: 13659
Keywords: hydrodynamics, model testing, resistance, naval engineering, Naval architecture. Shipbuilding. Marine engineering, Civil and Structural Engineering, Mechanical Engineering, Ocean Engineering, Applied Mathematics, Numerical Analysis
Subjects: Naval Science > Naval architecture. Shipbuilding. Marine engineering
Department: Faculty of Engineering > Naval Architecture and Marine Engineering
Depositing user: Mrs Thelma Will
Date Deposited: 21 Dec 2009 15:53
Last modified: 15 Apr 2015 11:12
Related URLs:
URI: http://strathprints.strath.ac.uk/id/eprint/13659

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