Spectral fatigue analysis of a tensioned riser compliant tower:

• Main Authors: Karadeniz, H., Vrouwenvelder, A.C.W.M., Shi, C.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 1998
• Subjects: Architecture and Building; Arctic
• Online Access: http://resolver.tudelft.nl/uuid:324e2228-f66b-469c-9c8b-a5f04b7be73f

In this paper, the conceptual Tensioned Riser Compliant Tower (TRCT) structure of the Shell Oil, which is developed for a region of approximately 600 meter water depth of the West of Shetlands in the North Sea, is analyzed by using the SAPOS program of the Delft University of Technology. The fatigue damage and life time calculations are carried out by using the practical damage models, BS F2 S-N curve for members and Class T S-N curve for joints, under realistic sea state conditions based on observations in the area for both uni- and multi-directional waves. All legs and braces of the tower, as well as corresponding joints, are checked for possible damages, and consequently, damage distribution diagrams are provided. In the analysis, the static- dynamic- and both static+dynamic response contributions are used separately to investigate the dominant response contribution. Results are presented in detail