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OTO 0059/1999

Validation of inspection planning methods: summary report.

Fatigue is of significant concern for load bearing offshore structures in the North Sea. The present tools for predicting fatigue life or crack growth imply scattered estimates. There is a need for more reliable fatigue life and defect assessment procedure for the most frequent failure observed. The availability of a database of inspection data to correlate actual with predicted performance will assist the development of fatigue assessment procedures representing the observed growth. Describes the in-service observation of the data collected; calculation of the reliability estimate of observed events; quantitive comparison of the theoretical predications and in-service observations; the concept of adjustment factors; consequences of the results. Makes recommendations for further work.

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Updated 2016-07-27