A PROBABILISTIC DYNAMIC AND FATIGUE ANALYSIS PROCEDURE FOR MOORING SYSTEMS

Although FPS and MODU mooring systems are designed for the same purpose of keeping a floating vessel on location, the two systems differ significantly in terms of hardware and deployment duration. In general, a quasi-static analysis is recommended for evaluating the performance of a MODU mooring, while a more rigorous dynamic analysis including fatigue life prediction is considered necessary for the final design of a permanently-installed FPS mooring. This paper presents a probabilistic dynamic and fatigue analysis procedure for analyzing the performance and behavior of FPS mooring systems. This procedure predicts the probabilistic tension and fatigue life of an FPS mooring, taking into account the long-term environmental variation, low frequency and wave frequency motions, and line dynamics. Analyses are presented for two example cases: a chain-wire-buoy mooring system for a semisubmersible FPS and a stern turret chain-wire combination mooring system for a tanker FPSO. In addition, a long term probabilistic description is derived for total vessel offset.

  • Supplemental Notes:
    • Conference paper; Paper OTC-6036
  • Authors:
    • Tein, Y S
    • Lohr, C J
    • Bruen, F J
  • Conference:
  • Publication Date: 0

Media Info

  • Features: References;
  • Pagination: 10p.

Subject/Index Terms

Filing Info

  • Accession Number: 00658641
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM