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Bending Fatigue Analysis of Sea Floor Observatory Moorings

[+] Author Affiliations
Seon Han, Mark Grosenbaugh

Woods Hole Oceanographic Institution, Woods Hole, MA

Paper No. OMAE2003-37117, pp. 545-550; 6 pages
doi:10.1115/OMAE2003-37117
From:
  • ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering
  • Volume 3: Materials Technology; Ocean Engineering; Polar and Arctic Sciences and Technology; Workshops
  • Cancun, Mexico, June 8–13, 2003
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3683-5 | eISBN: 0-7918-3672-X
  • Copyright © 2003 by ASME

abstract

The purpose of this paper is to provide design criteria for seafloor observatory moorings where the principle mooring line element is an electro-mechanical (EM) cable, and the primary cause for failure is the bending fatigue at terminations. A single point mooring system that consists of a discus surface buoy, an S-tether, a subsurface buoy, and an anchor is considered for this analysis. The waves are assumed random and modeled using the Pierson-Moskowitz spectrum. Raoof’s contact stress-slip parameter at the connection between the surface buoy and the EM cable is used to evaluate a particular design and to provide general guidelines to arrive at optimal design.

Copyright © 2003 by ASME

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