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 Arifah Ali,Adi Maimun,Yasser M. Ahmed,et al.Resistance Analysis of a Semi-SWATH Design Concept in Shallow Water[J].Journal of Marine Science and Application,2017,(2):182-189.[doi:10.1007/s11804-017-1406-x]
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Resistance Analysis of a Semi-SWATH Design Concept in Shallow Water


Resistance Analysis of a Semi-SWATH Design Concept in Shallow Water
Arifah Ali1 Adi Maimun1 Yasser M. Ahmed2 Rahimuddin3
Arifah Ali1 Adi Maimun1 Yasser M. Ahmed2 Rahimuddin3
1. Marine Technology Center, Department of Aeronautics, Automotive & Ocean Engineering, Universiti Teknologi Malaysia, Skudai 81310 UTM, Malaysia;
2. Department of Naval Architecture and Marine Engineering, Faculty of Engineering, Alexandria University, Alexandria 21526, Egypt;
3. Program Studi Teknik Sistem Perkapalan, Universitas Hasanuddin, Makassar, 90245, Indonesia
resistancewave heightsemi-SWATHshallow waterfin stabilizers
Resistance analysis is an important analytical method used to evaluate the hydrodynamic performance of High Speed Craft (HSC). Analysis of multihull resistance in shallow water is essential to the performance evaluation of any type of HSC. Ships operating in shallow water experience increases in resistance because of changes in pressure distribution and wave pattern. In this paper, the shallow water performance of an HSC design concept, the semi-Small Waterplane Area Twin Hull (semi-SWATH) form, is studied. The hull is installed with fin stabilizers to reduce dynamic motion effects, and the resistance components of the hull, hull trim condition, and maximum wave amplitude around the hull are determined via calm water resistance tests in shallow water. These criteria are important in analyzing semi-SWATH resistance in shallow water and its relation to flow around hull. The fore fin angle is fixed to zero degrees, while the aft fin angle is varied to 0o, 5o, 10o, and 15o. For each configuration, investigations are conducted with depth Froude numbers (FrH) ranging from 0.65 to 1.2, and the resistance tests are performed in shallow water at the towing tank of UTM. Analysis results indicate that the resistance, wave pattern, and trim of the semi-SWATH hull form are affected by the fin angle. The resistance is amplifiedwhereas the trim and sinkage are reduced as thefin angle increases. Increases in fin angle contribute to seakeeping and stability but affect the hull resistance of HSCs.


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Received date:2016-1-19;Accepted date:2017-1-10。
Corresponding author:Arifah Ali, Email: arifah2@live.utm.my
Last Update: 2017-05-09