Probabilistic maintenance optimization for fatigue-critical components with constraint in repair access and logistics

Title: Probabilistic maintenance optimization for fatigue-critical components with constraint in repair access and logistics
Authors: Zou, Guang
Banisoleiman, Kian
González, Arturo
Permanent link: http://hdl.handle.net/10197/9570
Date: 21-Sep-2018
Abstract: There is a need to consider repair delay and incurred failure risk in maintenance optimization for some fatigue-critical structural details in marine and offshore structures. For example, in some cases, immediate repair may not be feasible due to weather, geographical location and/or technical restrictions. Also, immediate repair may be much more expensive than well-organized delayed repair. Moreover, detected cracks may sometimes be left unattended until more cracks are found and repaired together. This paper investigates a probabilistic maintenance optimization method allowing for repair delay and the incurred failure risk. The maintenance strategy considering repair delay is optimized based on uncertainty modeling, reliability and life-cycle cost analysis. Special features of the maintenance strategy and its impacts on fatigue reliability and life-cycle costs are discussed on an illustrative example. A method to quantify the risk incurred by repair delay is proposed. It is found that repair delay can result in a significant decrease in fatigue reliability if inspection is scheduled in the late stage of service life. The benefits of the maintenance strategy to fatigue reliability and life-cycle costs are very sensitive to the inspection method. The failure risk incurred by repair delay would be the predominant risk in the life cycle.
Funding Details: European Commission Horizon 2020
Type of material: Conference Publication
Keywords: Integrity managementProbabilistic methodsRisk-based inspectionMaintenance optimizationDecision analysis
Other versions: http://www.psam14.org/
Language: en
Status of Item: Peer reviewed
Is part of: Proceedings of the 14th International Conference on Probabilistic Safety Assessment and Management (PSAM14)
Conference Details: The 14th International Conference on Probabilistic Safety Assessment and Management (PSAM 14), Los Angeles, United States of America,
Appears in Collections:Critical Infrastructure Group Research Collection
Earth Institute Research Collection
Civil Engineering Research Collection
TRUSS-ITN Research Collection

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