FATIGUE DAMAGE FOR LATTICE LEGS OF JACK-UP DRILLING PLATFORMS
Cumulative fatigue damage for the lattice legs of a mobile jack-up platform, which operates in different areas of the world, is very difficult to estimate because different portions of the legs are stressed under different environmental conditions. This paper describes a fatigue analysis performed by the Author for one of the jack-up platforms designed by The Offshore Company. The analysis was based on a drilling record compiled from the operation history of several of the jack-up platforms which have operated in the North Sea. Stress concentration factors for two different K-joints obtained from finite-element analysis, comparison of different S-N curves, comparison of fatigue lives for mobile and fixed platforms, and comparison of theoretical results with field experience are discussed in this paper.
- Presented at Energy Technology Conference, September 18-22, 1977.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY United States 10016-5990
- Kwan, C T
- Publication Date: 1977
- Features: References;
- Pagination: 8 p.
- TRT Terms: Fatigue (Mechanics); Finite element method; Stresses
- Uncontrolled Terms: Fatigue life; Stress concentration
- Old TRIS Terms: Fatigue stress; Jack up rigs
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00180038
- Record Type: Publication
- Source Agency: British Ship Research Association
- Report/Paper Numbers: Paper 77-Pet-11
- Files: TRIS
- Created Date: Sep 27 1978 12:00AM