Fatigue life improvement methods are typically used for life extension of welded joints in connection with repair of damaged or aging structures. Additionally, several design codes allow the use of such methods for increasing the fatigue strength in cases where too short predicted fatigue lives are found during a late stage of the design or fabrication process. This paper describes the use of hammer peening and needle peening to increase the fatigue strength of two types of structural details in Troll C, a new floating production unit fabricated in Korean during 1998–1999. The improvement work was carried out shortly before shipping the platform to Norway where the deck and production equipment was installed. The need for upgrading became apparent at a late stage during construction following refined finite element analyses that were carried out after all major structural changes had been implemented. Close cooperation was maintained with the classification society, and the new guidelines for peening techniques that resulted from the project are now included as a informative procedure in the NORSOK Fabrication Standard M-101.
Skip Nav Destination
ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering
June 8–13, 2003
Cancun, Mexico
Conference Sponsors:
- Ocean, Offshore, and Arctic Engineering Division
ISBN:
0-7918-3683-5
PROCEEDINGS PAPER
Fatigue Life Extension of Structural Details of a Floating Production Unit by Weld Improvement Methods
P. J. Haagensen,
P. J. Haagensen
Norwegian University of Science and Technology, Trondheim, Norway
Search for other works by this author on:
Andreas Fredborg
Andreas Fredborg
ABB Offshore Technology, Oslo, Norway
Search for other works by this author on:
P. J. Haagensen
Norwegian University of Science and Technology, Trondheim, Norway
Andreas Fredborg
ABB Offshore Technology, Oslo, Norway
Paper No:
OMAE2003-37057, pp. 11-15; 5 pages
Published Online:
January 23, 2009
Citation
Haagensen, PJ, & Fredborg, A. "Fatigue Life Extension of Structural Details of a Floating Production Unit by Weld Improvement Methods." Proceedings of the 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. pp. 11-15. ASME. https://doi.org/10.1115/OMAE2003-37057
Download citation file:
6
Views
Related Proceedings Papers
Related Articles
The Influence of Mechanical and Laser Cutting on the Fatigue Strengths of Square Hollow-Section Welded T-Joints
J. Offshore Mech. Arct. Eng (August,2012)
Improvement of the Fatigue Behavior of Stainless Steel Substrates by Low Pressure Fluidized Bed Peening (FBP)
J. Eng. Mater. Technol (April,2011)
Review of Residual Stress Modification Techniques for Extending the
Fatigue Life of Metallic Aircraft Components
Appl. Mech. Rev (January,2015)
Related Chapters
Subsection NE — Class MC Components
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Third Edition
Subsection NE—Class MC Components
Companion Guide to the ASME Boiler & Pressure Vessel Code, Volume 1, Second Edition
Fatigue Verification and Nonlinear Alternatives
Toward Consistent Design Evaluation of Nuclear Power Piping by Nonlinear Finite Element Analysis