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- W577295980 abstract "Offshore structures are susceptible to fatigue damage due to the time varying hydrodynamic loads and the high stress levels. Therefore, in order to obtain a given high reliability of the structure inspection schemes have to be formulated in order to keep track of crack initiation and crack growth. Usually the inspections and the subsequent repairs have to be done on site requiring a skilled work-force and expensive manhours. It is therefore important to optimise the intervals between the inspections, the number of joints inspected and the amount of repair work. In the present paper a Bayesian approach is taken, following a procedure originally suggested by Itagaki and Shinozuka. Here the statistical distributions of some of the parameters in the crack initiation, crack detection and crack propagation are updated at each inspection and used to derive better estimates for the number of severe cracks as function of time until the next inspection. Thereby, it is possible to decide on an appropriate interval to the next inspection taking into account both the cost of the inspection and the cost of repairing the severe cracks. As an example a jack-up operating in the North Sea is chosen. Inspection data for 3 consecutive inspections of several joints close to the lower guides are available. Based on an analysis of these results the implementation and usefulness of the present Bayesian approach is discussed." @default.
- W577295980 created "2016-06-24" @default.
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- W577295980 date "1992-01-01" @default.
- W577295980 modified "2023-10-15" @default.
- W577295980 title "A BAYESIAN INSPECTION PROCEDURES APPLIED TO OFFSHORE STEEL PLATFORMS" @default.
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