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Preventive maintenance strategy for single component of electric multiple units with bi-objective optimization
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Jingquan TONG1, Shengjie QIANG2, Yuchang HE3, Yanli LU1
Chinese Journal of Construction Machinery | 2025, 23(2) : 346 - 350
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Chinese Journal of Construction Machinery | 2025, 23(2): 346-350
• Performance Mensuration, Experimentation and Fault Diagnosis •
Preventive maintenance strategy for single component of electric multiple units with bi-objective optimization
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Jingquan TONG1, Shengjie QIANG2, Yuchang HE3, Yanli LU1
Affiliations
  • 1. School of Rail Transit, Guangdong Communication Polytechnic, Guangzhou 510650, Guangdong, China
  • 2. School of Transportation Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
  • 3. China Railway Wuhan Group Co., Ltd., Wuhan 430061, Hubei, China
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In order to explore the effects of maintenance difficulty degree of component on the maintenance cost and availability of the model. Taking a mechanical component of electric multiple unit (EMU) as the research object, and a component reliability threshold as the decision variable, the two-parameter Weibull distribution is adopted to describe the evolution law of component failure rate, combined with the existing fixed period multi-level imperfect maintenance rule of EMU in China, a preventive maintenance strategy for single component of EMU with bi-objective optimization is established. Bi-level imperfect maintenance is implemented in the maintenance mode and the concept of efficiency-cost ratio is introduced to discriminate the selection of each maintenance method of the component. Considering four factors, the difficulty of detecting parts, the location of parts, the difficulty of disassembling parts and the complexity of parts. Analytic hierarchy process (AHP) is adopted to quantify the maintenance difficulty degree and to study impact on the cost and availability of maintenance. The analysis shows that the maintenance model considering the maintenance difficulty can effectively reduce the maintenance cost and improve the availability, which provides a theoretical reference for the development of the maintenance strategy of EMU.

electric multiple unit  /  maintenance difficulty degree  /  decision variable  /  bi-level imperfect  /  efficiency-cost ratio
Jingquan TONG, Shengjie QIANG, Yuchang HE, Yanli LU. Preventive maintenance strategy for single component of electric multiple units with bi-objective optimization[J]. Chinese Journal of Construction Machinery, 2025 , 23 (2) : 346 -350 .
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  • Online Date：2025-12-16
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    1. School of Rail Transit, Guangdong Communication Polytechnic, Guangzhou 510650, Guangdong, China
    2. School of Transportation Engineering, East China Jiaotong University, Nanchang 330013, Jiangxi, China
    3. China Railway Wuhan Group Co., Ltd., Wuhan 430061, Hubei, China
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