SOME RECENT TRENDS IN HULL FORMS FOR MERCHANT SHIPS

Some examples are given of hull form investigations recently carried out by The Swedish State Shipbuilding Experimental Tank (SSPA). Special attention was paid to the qualities of the hull forms with regard to the propulsive performance including propeller cavitation and vibration. Two main categories of merchant ships were selected for closer studies, namely: Large tankers and bulkers (VLCCS/ULCCS) and high-powered container/ro-ro ships. The analysis and conclusions from the investigation seem to justify, for the VLCCS/ULCCS, a forebody of ellipsoidal form and an afterbody of twin-skeg (or twin-gondola) shape, as this combination gives the lowest required shaft horse power. For the high-powered container/ro-ro vessel, where cavitation and vibration problems often occur, an afterbody hull form with "free space" around the propeller(s) is recommended. The choice of an economic forebody hull form depends strongly on whether a reasonably constant forward draft can be kept.

  • Corporate Authors:

    Swedish State Shipbuilding Experimental Tank

    P.O. Box 24001
    S-40022 Goteborg 24,   Sweden 
  • Authors:
    • Williams, A
  • Publication Date: 1978

Media Info

  • Pagination: 57 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00196208
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PUB-80
  • Files: TRIS
  • Created Date: Aug 15 1979 12:00AM