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|Type:||Artigo de evento|
|Title:||An Evaluation Procedure For Probability Of Fatigue Failure In Offshore Steel Catenary Risers [um Procedimento Para Avaliação Da Probabilidade De Falha Por Fadiga Em Um Riser Rígido Em Catenária]|
Da Costa Matt C.G.
|Abstract:||The current work presents a procedure to evaluate the probability of fatigue failure in an offshore Steel Catenary Riser (SCR) through the identification and the assessment of the influence of involved main parameters taking into account the probability of failure. Meteocean conditions such as waves, current and platform motions, and uncertainties due to total cumulative damage (Miner-Palmgren's Rule) are considered in the procedure. The probabilistic methodology is taken, and the analytical approach based on the First Order Reliability Method (FORM) is applied. A failure function for the SCR is defined considering its structural strength and the loads acting on it. The random nature of the meteocean conditions as well as the total cumulative damage are considered to the sensitivity analysis for the probability of failure. The procedure suggested is applied for two practical cases. The first case uses data from the literature, and the second one considers data collected from a typical Brazilian offshore field operation. On both cases, the SCR are connected to a semi-submersible platform at the sea surface. The results of the probability of failure are observed for four different locations along the SCR length such as the influence of each involved parameter.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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