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Journal of Marine Science and Application

, Volume 16, Issue 2, pp 182–189 | Cite as

Resistance analysis of a semi-SWATH design concept in shallow water

  • Arifah Ali
  • Adi Maimun
  • Yasser M. Ahmed
  • Rahimuddin
Article

Abstract

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 0°, 5°, 10°, and 15°. For each configuration, investigations are conducted with depth Froude numbers (Fr H ) 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 amplified whereas the trim and sinkage are reduced as the fin angle increases. Increases in fin angle contribute to seakeeping and stability but affect the hull resistance of HSCs.

Keywords

resistance wave height semi-SWATH shallow water fin stabilizers 

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Notes

Acknowledgement

The authors would like to express their appreciation for the technical from staffs of MTC UTM, Faculty of Mechanical Engineering, UTM.

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Copyright information

© Harbin Engineering University and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Arifah Ali
    • 1
  • Adi Maimun
    • 1
  • Yasser M. Ahmed
    • 2
  • Rahimuddin
    • 3
  1. 1.Marine Technology Center, Department of Aeronautics, Automotive & Ocean EngineeringUniversiti Teknologi MalaysiaSkudaiMalaysia
  2. 2.Department of Naval Architecture and Marine Engineering, Faculty of EngineeringAlexandria UniversityAlexandriaEgypt
  3. 3.Program Studi Teknik Sistem PerkapalanUniversitas HasanuddinMakassarIndonesia

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