A tension leg platform (TLP) tendon system experiences oscillatory tensile stresses, and therefore is vulnerable to fatigue and fracture. Because design factors have significant uncertainty, a reliability analysis to quantify structural performance is appropriate. A maintenance program of periodic inspection and repair shows promise for improving system reliability and enhancing structural integrity. The performance of a TLP tendon system was simulated in order to study the relationship of design factors to system reliability. Effects on system reliability and maintenance performance (repair and replacement rates) can be studied as a function of (a) number of joints, J; (b) number of members, M; (c) inspection frequency; (d) inspection sensitivity as defined by the POD (probability of detection) curve; (e) ultimate strength; (f) repair policy; etc. The performance of an initially damaged or flawed tendon system is investigated. The reliability of a system that uses pressurized tendons to detect through-thickness cracks is studied, as is the vulnerability of the tendon system before replacement of broken tendons.
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Fatigue and Fracture Reliability and Maintainability of TLP Tendons
C. J. Kung,
C. J. Kung
American Bureau of Shipping, 2 World Trade Center, New York, NY 10048
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P. H. Wirsching
P. H. Wirsching
Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ 85721
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C. J. Kung
American Bureau of Shipping, 2 World Trade Center, New York, NY 10048
P. H. Wirsching
Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ 85721
J. Offshore Mech. Arct. Eng. May 1993, 115(2): 137-141 (5 pages)
Published Online: May 1, 1993
Article history
Received:
August 7, 1992
Revised:
January 11, 1993
Online:
June 12, 2008
Citation
Kung, C. J., and Wirsching, P. H. (May 1, 1993). "Fatigue and Fracture Reliability and Maintainability of TLP Tendons." ASME. J. Offshore Mech. Arct. Eng. May 1993; 115(2): 137–141. https://doi.org/10.1115/1.2920103
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