A Condition-based Maintenance Method for Subsea Christmas Tree under Multi-level Maintenance Measures
The maintenance measure of fully restoring components to their initial operational state results in the inability to provide accurate maintenance plans.In real-world systems,there are more maintenance details that require a more complex description of the component repair process.A condition-based maintenance method was proposed for key components of subsea Christmas trees,utilizing a multi-level maintenance measures based on Wiener processes.A continuous degradation model of components was established based on historical operating data.A maintenance classification method was proposed by combining historical maintenance data with the K-nearest neighbors classification method.The system's maintenance plan over its operational cycle was obtained through multi-objective optimization algorithms.The results demonstrate that considering a multi-level maintenance measures can provide more accurate mainte-nance plans for multi-component systems,effectively balancing the trade-off between system reliability,availability,and maintenance costs.