Experimental Study on Ship Performances of a Catamaran with Asymmetric Demi-Hulls

左右非対称なデミハルを有する双胴船の性能に関する実験的研究

To capture the ship performances of a catamaran with asymmetric demi-hulls, tank tests were carried out such as resistance test in still water, measurement test of wave height of wash, seakeeping test in regular head waves and captive test for measuring hydrodynamic forces on maneuvering using a scaled model with 2.036m in length. To investigate the effect of clearance of the demi-hulls on the performances, the clearance was changed in the tests as W/B = 2.55, 2.90 and 3.25, where W denotes the breadth overall and B the breadth of the demi-hull. Also, two ship models with different load water line tendencies were used: one is the inside flat and outside round type (IF-type) and the other the outside flat and inside round type (OF-type). The test results obtained are as follows: Residual resistance coefficient of W/B = 2.90 in IF-type is the smallest at the design speed corresponding to Froude number Fn = 0.44 and that of W/B = 2.55 in OF-type is secondary small. In the maximum wave height of the wash, OF-type is almost 30% smaller than IF-type in any demi-hull clearances. In both performances of heave and pitch motions, and added resistance in head waves, OF-type is superior to IF-type near the design speed. Smaller demi-hull clearance and IF-type are better in course keeping performance. The course keeping and turning performances are suitable in any conditions of the catamaran.

• Record URL:
  https://doi.org/10.2534/jjasnaoe.15.101
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Experimental+Study+on+Ship+Performances+of+a+Catamaran+with+Asymmetric+Demi-Hulls&author=H.+Yasukawa&author=N.+Hirata&author=S.+Ikezoe&author=Y.+Hirata&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/18803717
• Authors:
  • Yasukawa, Hironori
  • Hirata, Noritaka
  • Ikezoe, Shuji
  • Hirata, Yuichi
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 101-110
• Serial:
  • Journal of the Japan Society of Naval Architects and Ocean Engineers
  • Volume: 15
  • Issue Number: 0
  • Publisher: Japan Society of Naval Architects and Ocean Engineers
  • ISSN: 1880-3717
  • EISSN: 1881-1760
  • Serial URL: https://www.jstage.jst.go.jp/browse/jjasnaoe/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Catamarans; Hulls; Hydrodynamics; Maneuvering; Seakeeping; Wave height
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 01505587
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Jan 27 2014 11:27AM