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Publicações
Li, S. S. e Guedes Soares, C. (2017), “A procedure to generate design load-time histories for fatigue strength assessment of offshore structures”, Progress in the Analysis and Design of Marine Structures, Guedes Soares, C. & Garbatov Y. (Eds.), Taylor & Francis Group, London, UK, pp. 13-20
A procedure to generate the fatigue load history based on a Storm Model is proposed in this paper. Adopting one year as the climatic reference period the procedure determines the sea state sequence within one year, and for each sea state, the wave-induced stresses are modelled by a stress response spectrum that is calculated from the stress Response Amplitude Operator (RAO) and a wave energy spectrum. Next, the stress time history is simulated for each sea state in the sequence corresponding to one year. Finally, the one-year time series will be repeated to the whole design life or until final failure occurs in the studied structure. An application example is given to demonstrate the fatigue life prediction for a tubular T-joint of an offshore platform by using the generated load history, which shows the practical and effective use of the proposed procedure.
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