A COMPLETE AND CONSISTENT METHODOLOGY FOR THE ASSESSMENT OF MOORING SYSTEMS

The most recent codes for the assessment of mooring lines recommend performing a quasi-static analysis of the whole mooring system, to be completed by a dynamic analysis of the most critical line in its average vertical plane. These codes provide revised safety factors that are dramatically smaller than those used in the past, on the grounds of reduced uncertainties associated with partial dynamic considerations. This paper explains why such new practices are not necessarily consistent or appropriate and presents a comprehensive and consistent methodology for mooring system assessments based on quasi-dynamic principles. Calibration and validation have been derived from a very large number of cases, thus ensuring optimization between over-scantling, safety and cost effectiveness. Equations used to compute loads and motions are given in detail together with damping coefficients for each type of unit. Safety factors are also specified for maximum design condition.

  • Supplemental Notes:
    • OTC 95, 27th Annual Offshore Technology Conf; 1-4 May 1995; Houston, Tx, USA. Procs. Vol 2, p 153 [12 p, 6 ref, 8 fig]
  • Authors:
    • Leblanc, L
    • Isnard, J L
    • Wilczynski, H
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00727523
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 1 1996 12:00AM