Reliability Analysis of an Offshore Structure:A Case Study II

• Main Authors: Sørensen, John Dalsgaard, Rackwitz, R., Thoft-Christensen, Palle, Lebas, G.
• Other Authors: Guedes Soares, C., Murotsu, Y., Pittaluga, A., Spencer, J.S., Stahl, B.
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Society of Mechanical Engineers 1992
• Subjects: Reliability Analysis; Offshore Structure; Bayesian Techniques; Offshore Structures; Arctic
• Online Access: https://vbn.aau.dk/da/publications/4a2e77d0-a86a-11da-8341-000ea68e967b

For an offshore structure in the North Sea it is assumed that information from measurements and inspections is available. As illustrations measurements of the significant wave height and the marine growth and different inspection and repair results are considered. It is shown how the reliability estimates of the structure can be updated using Bayesian techniques. By minimizing the total expected costs including inspection, repair and failure costs during the lifetime an optimal inspection and repair strategy can be determined. The decision variables are the number of inspections, the time intervals between inspections and the inspection qualities. A parameter study is performed and an updated inspection plan is determined after the first inspection has taken place. For an offshore structure in the North Sea it is assumed that information from measurements and inspections is available. As illustrations measurements of the significant wave height and the marine growth and different inspection and repair results are considered. It is shown how the reliability estimates of the structure can be updated using Bayesian techniques. By minimizing the total expected costs including inspection, repair and failure costs during the lifetime an optimal inspection and repair strategy can be determined. The decision variables are the number of inspections, the time intervals between inspections and the inspection qualities. A parameter study is performed and an updated inspection plan is determined after the first inspection has taken place.