Opportunity Maintenance Strategy Research of EMU Components Considering Fault Correlation
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摘要: 为探究故障相关作用对动车组部件维护作业的影响，利用故障链理论描述部件之间的故障相关性，在修复非新条件下分析部件故障率的演化规律。以可靠度为中心，一个更换周期内的成本最小为目标，优化单部件的维护周期。并考虑经济相关性，引入机会维护策略，进而从系统层优化部件的维护周期。算例表明，当部件之间存在故障相关关系时，要保证被影响部件的可靠度需要花费更多的维护成本，同时被影响部件的维护计划受到对它产生故障相关作用部件的维护计划的影响。机会维护策略可有效降低设备维护成本，对设备维护决策具有一定的参考意义。Abstract: In order to explore the influence of fault correlation on the maintenance of EMU components, the fault correlation between components is described by fault chain theory, and the evolution law of component failure rate is analyzed under the condition of non-new repair. The maintenance cycle of a single component is optimized with reliability degree as the center and minimum cost within a replacement cycle as the goal. Considering economic relevance, opportunity maintenance strategy is introduced to optimize component maintenance cycle from system level. The example shows that when there is a fault related effect between components, more maintenance cost is needed to ensure the reliability of the affected components. At the same time, the maintenance plan for the affected component is affected by the maintenance plan for the component that is responsible for its failure. Opportunity maintenance strategy can effectively reduce the cost of equipment maintenance and has certain reference significance for equipment maintenance decision.
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Key words:
- EMU components /
- fault chain /
- fault correlation /
- opportunistic maintenance /
- economic relevance
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部件 cp/y cr/y ct/y A 100 2 900 450 B 130 2 670 480 C 120 2 580 420 D 120 2 580 420 
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表 4 部件B的优化结果
θ1 R 维护时机序列/104 km C/y 0 0.82 44-82-116-144-170-192-212-228 10 466.4 0.04 0.81 44-82-116-144-170-192-212-228 10 797.1 0.08 0.80 44-82-116-144-170-192-212-228 11 127.8
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表 5 部件C/D的优化结果
θ R 维护时机序列/104 km C/y θ2=0.03
θ3=0.040.82 42-78-110-138-162-
184-202-218-23210 296.4
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表 6 机会维修优化结果
部件 θ 单部件维护时机序列/104 km C/y 机会维护时机序列/104 km Cj/y A - 42-78-110-138-162-182-200-216-230 42-78-110-138-162-182-200-212-228 B θ1=0.08 44-82-116-144-170-192-212-228 42 570.8 42-78-116-144-170-192-212-228 38 110.5 C/D θ2=0.03
θ3=0.0442-78-110-138-162-184-202-218-232 42-78-110-138-162-182-200-218-228 预防性维护停机21次 预防性维护停机14次
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