The structural fatigue verification of a steel catenary riser model is performed by means of two random procedures of analysis. One of them is a nonlinear time-domain approach, based on simulation technique. The other one is a linearized frequency-domain approach, that considers the the structure presents a nonlinear static response and the dynamic response is almost linear around the static deformed configuration. Fatigue damage is calculated based on S-N curves and the Palmgren-Miner's rule. PETROBRAS in-house software were used for the analyses. Results are compared and commented.
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