STUDIES ON OPTIMIZATION OF SHIP STRUCTURES. (3RD REPORT) OPTIMUM DESIGN OF LONGITUDINAL MEMBERS OF A TANKER

In regard to oil tankers of approximately 130 to 250 thousand ton deadweight, optimum design of longitudinal strength members is undertaken. Ship size, main proportion, transverse web space and so forth are varied. Rule requirement specified by the ship classification society of Japan is adopted as standard for design. A kind of nonlinear programming techniques, SUMT is used for numerical search. By some numerical results obtained, trends of optimum longitudinal frame space, frame area and plate thickness are examined. Furthermore the influence of using high tensile steel combined with mild steel and that of taking account of fabrication cost are studied. Main conclusions are as follows: I. In comparison with actual design, optimum longitudinal frame space, frame area and bottom plate thickness are larger, hence steel weight of midship section decreases by 1 to 3 percent. II. As ship size increases, both longitudinal member size and steel weight of midship section increases, however steel weight per cargo space decreases. III. When 50 Kilogram per Millimeter Squared high tensile steel is used combined with mild steel, steel weight decreases by about 12 percent while steel cost remains almost unchanged.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05148499
• Corporate Authors:

  Society of Naval Architects of Japan

  23 Shiba-kotohiracho, Minato-ku
  Tokyo 135,   Japan 

  Society of Naval Architects of Japan

  15-16, Toranomon, 1-chome, Minato-ku
  Tokyo,   Japan 
• Authors:
  • Kitamura, K
• Publication Date: 1972-12

Language

• Japanese

Media Info

• Features: References;
• Pagination: p. 335-348
• Serial:
  • Journal of the Society of Naval Architects of Japan
  • Volume: 132
  • ISSN: 0514-8499

Subject/Index Terms

• TRT Terms: Hulls; Longitudinal strength; Naval architecture; Tankers; Vehicle design; Weight
• Uncontrolled Terms: Ship design
• Old TRIS Terms: Weight calculation
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00072514
• Record Type: Publication
• Source Agency: Society of Naval Architects of Japan
• Files: TRIS
• Created Date: Dec 19 1974 12:00AM