TORSIONAL RESPONSE OF A SHIP IN THE SEAWAY WITH PARTICULAR REFERENCE TO AN LNG TANKER

Classical theory for torsion of thin-walled prismatic beams is extended and applied to ship hulls. The non-prismatic ship hull is approximated by a number of prismatic elements. Warping restrained structures such as torsion boxes and transverse deck strips are taken into account. This procedure together with statistical wave data, ship motion response in its six degrees of freedom, and a statistical procedure gave the largest expected torsional response. It is concluded that a sufficiently accurate loading may be obtained in a relatively simple manner. With respect to alternative designs it can be concluded that torsion boxes, generally, are inefficient in doing what they are primarily meant for--stiffening a hull that is flexible in torsion.

• Corporate Authors:

  Royal Norwegian Council for Scientific & Indus Res

  Radhusgaten 8, Sentrum
  Oslo,   Norway 
• Authors:
  • Haslum, K
  • Nordenstrom, N
  • Pedersen, B
  • Tonnessen, A
• Publication Date: 1973

Media Info

• Features: Appendices; References;
• Pagination: p. 13-30
• Serial:
  • Norwegian Maritime Research
  • Volume: 1
  • Issue Number: 3
  • Publisher: Royal Norwegian Council for Scientific & Indus Res

Subject/Index Terms

• TRT Terms: Chemical tankers; Design; Hulls; Liquefied gases; Liquefied natural gas; Stiffness; Torsion; Torsional strength
• Old TRIS Terms: Hull torsional rigidity
• Subject Areas: Design; Marine Transportation; Materials;

Filing Info

• Accession Number: 00050805
• Record Type: Publication
• Source Agency: Royal Norwegian Council for Scientific & Indus Res
• Files: TRIS
• Created Date: Jan 24 1974 12:00AM