STRUCTURAL DESIGN-BY-ANALYSIS APPROACH APPLIED TO A PRODUCT OIL CARRIER WITH A UNI-DIRECTIONAL GIRDER SYSTEM

A new concept of ship hull structure has been developed, where a complete double-skinned hull is stiffened by longitudinal girders only, to reduce the crossing of structural members and weld lines to a minimum for ease of welding by machine. This paper outlines the unidirectional girder system and its application to product oil carriers and discusses its advantages over conventional structures. The main focus of the paper is the design procedure adopted. Since the hull structure is so different from conventional ships that the design is beyond the scope of classification societies rules, a "design by analysis" approach is necessary. Besides describing the procedures of analysis used in the design, the results of a safety assessment of a 40,000 dwt product oil carrier, now under construction, are presented. Based on these results, the ship with the new structural system is found to offer greater safety than ships with conventional structure.

• Supplemental Notes:
  • Hitachi Zosen Tech. Rev., v 51 n 1, June 1990, p 14 [13 p, 14 ref, 4 tab, 17 fig]
• Authors:
  • Hori, T
  • Sekihama, M
  • Rashed, M H
• Publication Date: 1990

Language

• English

Subject/Index Terms

• TRT Terms: Design practices; Hulls; Tankers
• Old TRIS Terms: Design procedure; Longitudinal members; Product tankers
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00698623
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM