Cumulative fatigue damage for the lattice legs of a mobile jack-up platform, which operates in different areas of the world, is very difficult to estimate because different portions of the legs are stressed under different environmental conditions. This paper describes a fatigue analysis performed by the Author for one of the jack-up platforms designed by The Offshore Company. The analysis was based on a drilling record compiled from the operation history of several of the jack-up platforms which have operated in the North Sea. Stress concentration factors for two different K-joints obtained from finite-element analysis, comparison of different S-N curves, comparison of fatigue lives for mobile and fixed platforms, and comparison of theoretical results with field experience are discussed in this paper.

  • Supplemental Notes:
    • Presented at Energy Technology Conference, September 18-22, 1977.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • Kwan, C T
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00180038
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Paper 77-Pet-11
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM