Abstract:

Marine riser is an important component for the offshore oil platforms. Riser failure results in cessation of production and may lead to spillage and pollution. The deepwater risers under cyclic load due to ocean current experience significant fatigue damage. This paper focuses on the fundamental fatigue analysis philosophy of the deepwater risers, covering the discussion of different sources of cyclic load, S-N curves and combination of fatigue damages. Besides the deterministic approach, the risk based fatigue analysis is also studied in the probabilistic field.

Reference:

DNV-RP-F204, ‘Riser Fatigue’, 2005

Sen, T., ‘Probability of fatigue failure in steel catenary risers in deep water’, Journal of Engineering Mechanics, Sep. 2006