Multi-level Imperfect Maintenance Strategy for EMU Components from Perspective of Failure Risks

doi:10.3969/j.issn.1004-132X.2021.04.003

Abstract

Abstract: In order to reduce the total maintenance costs of EMU components in a life cycle, a preventive maintenance optimization strategy of EMU components was established based on multi-level imperfect maintenance mechanism under the current hierarchical maintenance mechanism of EMU in China, taking the components that needed to be replaced during the five-level maintenance of EMU as the research object, taking the impacts of failures on the operation safety of EMU, the impacts of failures on the delay of EMU and the difficulty of failure maintenances as the evaluation index of failure risks, the weight of each influencing factor was determined by analytic hierarchy process, and each influencing factor was scored, and the failure risks of EMU components were quantitatively evaluated. The imperfect maintenance modes of EMU components were divided into multi levels, primary maintenance, intermediate maintenance and advanced maintenance, which overcome the shortcomings of the former model that the imperfect maintenance mode was single and ignored the practical maintenance which the multi-level imperfect maintenance mode was commonly used. The simulation results show that the proposed maintenance strategy may maintain a higher reliability level and reduce the total costs of EMU component in a life cycle.

Key words: electric multiple unit(EMU) component, multi-level imperfect, preventive maintenance, failure risk, reliability

摘要： 为了降低动车组部件在一个寿命周期内的维修总成本，以动车组五级修程时需要更换的部件为研究对象，基于现行的分级检修制度，提出一种动车组部件多级非完美预防性维修策略。以故障对动车组运行安全和对动车组晚点的影响以及故障维修难易程度作为故障风险的评价指标，使用层次分析法和评分法量化评价部件的故障风险。将动车组部件非完美维修方式划分为初级维修、中级维修和高级维修三个级别，克服了以往模型中非完美维修方式单一、忽视实际维修中普遍采用多级非完美维修方式的不足。算例仿真结果表明，提出的维修策略可使动车组部件在一个寿命周期内保持更高的可靠度水平且总成本也有所减少。

关键词: 动车组部件, 多级非完美, 预防性维修, 故障风险, 可靠度

CLC Number:

U269.6

XIONG Lü , WANG Hong. Multi-level Imperfect Maintenance Strategy for EMU Components from Perspective of Failure Risks[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2021.04.003.

熊律, 王红. [轨道交通运维技术]风险视角下的动车组部件多级非完美维修策略[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2021.04.003.

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