Petrobras has been investigating the steel-catenary-riser (SCR) alternative since the beginning of the 1990s. Since then, fatigue verification has been an important issue, demanding good representation of the loading conditions that occur during the lifetime of the riser. The concern with fatigue has motivated Petrobras to research several areas, such as metocean data acquisition, hull design for motion optimization, special touch-down-point (TDP) joints, accurate models for vortex-induced-vibration (VIV) analysis, and the corrosion-fatigue effect.
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