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Publicações
Teixeira, A.P., Zayed, A. e Guedes Soares, C. (2010), “Reliability of Pipelines with Non-uniform Corrosion”, Journal of Ocean and Ship Technology, Vol. 1(1), pp. 12-30
This paper presents a reliability analysis of non-uniform corroded pipelines under internal pressure. In alternative to the uniform reduction of pipe thickness due to corrosion or a localised area of reduced thickness, it considers the spatial distribution of the thickness of the corroded pipeline represented by stochastic simulation of random fields. The random fields of corrosion are discretized and the maximum internal pressure is then assessed by finite element analysis. The Monte Carlo simulation method is used to assess the uncertainty of the estimates of the burst pressure of corroded pipelines. The importance of the spatial representation of the corrosion by random fields in alternative to the traditional approach based on a uniform reduction of pipeline thickness is demonstrated. Finally, the probabilistic model of the burst pressure of a pipeline with non-uniform corrosion thickness is used to assess its reliability when subjected to internal pressure using the first order reliability method (FORM).
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