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- W2034147370 abstract "The intensive use of FPSOs in Campos Basin, offshore Brazil, has demanded more attention on the fatigue design of flexible risers. Field experience and a new set of environmental data collected in the last years have shown a large number of swell waves reaching the floating units in quartering and beam seas, which has amplified the motions at the risers’ top connections. Hence, it is necessary to evaluate the occurrence probability of wave heading direction relative to the vessel, especially for beam seas, but also noting the probability increase of quartering seas considering the existence of bi-modal and bi-directional wave spectra. The simultaneous environmental conditions — wind, current and bi-directional waves (sea and swell) — registered in Campos Basin, were condensed in a few hundreds environmental conditions to enable its utilization on a simulation program, where the FPSO, mooring lines and risers were modeled to obtain the mean heading and offsets. This new set of FPSO headings were then used to define a new proposal of load conditions to evaluate the fatigue life of flexible risers. This new procedure was then applied to a case study for the FPSO P-33 employing the tools available at PETROBRAS research center. The results have confirmed the importance of beam and quarter seas, which respectively cause heavy roll and vertical motions at the turret and then, affecting the fatigue of the risers." @default.
- W2034147370 created "2016-06-24" @default.
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- W2034147370 date "2002-01-01" @default.
- W2034147370 modified "2023-09-23" @default.
- W2034147370 title "Flexible Riser Fatigue Procedure Using a Long Term Distribution of FPSO’s Heading Direction" @default.
- W2034147370 doi "https://doi.org/10.1115/omae2002-28145" @default.
- W2034147370 hasPublicationYear "2002" @default.
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