PROBABILISTIC METHODS FOR PLANNING OF INSPECTION FOR FATIGUE CRACKS IN OFFSHORE STRUCTURES
The declared aim of the authors of this recommended practice released by DNV GL class society was to provide the necessary guidelines for the proper understanding and correct use of various probabilistic methods for planning of the inspections of fatigue fractures in jacket structures, column stabilized units and floating production ships, including guidance for fatigue analysis of subject structures as required for the purpose of probabilistic analysis. The methodology of analysis presented in this recommended practice is general and might be used for planning of the inspections of any other structures that are subjected to serious dynamic loads, for example jack-up structures. Sixteen sections of the document address applicable standards and reference technical documentation, planning of the inspection for fatigue cracks, overview of analyses described above, fatigue analyses based on S-N data and on fracture mechanics, assessment of probability of fatigue failure of the structure, target reliability, calibration of fracture mechanics models to the test data, and assessment of the input parameters, detection probability, validation of the results, inspection planning, reporting, examples of the inspection planning, references etc.
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