Nylon and polyester lines used as shallow water moorings, towing hawsers, mooring hawsers and diving bell lift lines can be subjected to a high degree of cyclic loading. Understanding the manner in which the line responds to cyclic loading enhances the reliability of the system. This paper dicusses in detail an important concept with regard to dynamic applications of synthetic lines and explains its significance to the designer: the dynamic stiffness, or apparent spring constant, is 3-4 times greater than the quasi-static spring constant which is often misapplied to dynamic situations. If the quasi-static elasticity rather than the dynamic elasticity is used to calculate the peak load, the actual loads will be 3-4 times greater than the loads predicted from the calculation.

  • Supplemental Notes:
    • This paper was presented at the 12th Annual OTC in Houston, Texas, May 5-8, 1980.
  • Corporate Authors:

    Offshore Technology Conference

    6200 North Central Expressway
    Dallas, TX  United States  45206
  • Authors:
    • Bitting, K R
  • Publication Date: 1980

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Filing Info

  • Accession Number: 00325777
  • Record Type: Publication
  • Source Agency: Offshore Technology Conference
  • Report/Paper Numbers: Volume 3 Proceeding
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM