A Study on Determining the Optimal Replacement Interval of the Rolling Stock Signal System Component based on the Field Data 


Vol. 38,  No. 2, pp. 104-111, Apr.  2023
10.14346/JKOSOS.2023.38.2.104


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  Abstract

Rolling stock maintenance, which focuses on preventive maintenance, is typically implemented considering the potential harm that may be inflicted to passengers in the event of failure. The cost of preventive maintenance throughout the life cycle of a rolling stock is 60%–75% of the initial purchase cost. Therefore, ensuring stability and reducing maintenance costs are essential in terms of economy. In particular, private railroad operators must reduce government support budget by effectively utilizing railroad resources and reducing maintenance costs. Accordingly, this study analyzes the reliability characteristics of components using field data. Moreover, it resolves the problem of determining an economical replacement interval considering the timing of scrapping railroad vehicles. The procedure for determining the optimal replacement interval involves five steps. According to the decision model, the optimal replacement interval for the onboard signal device components of the “A” line train is calculated using field data, such as failure data, preventive maintenance cost, and failure maintenance cost. The field data analysis indicates that the mileage meter is 9 years, which is less than the designed durability of 15 years. Furthermore, a life cycle in which the phase signal has few failures is found to be the same as the actual durability of 15 years.

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  Cite this article

[IEEE Style]

박병노, 김경화, 김재훈, "A Study on Determining the Optimal Replacement Interval of the Rolling Stock Signal System Component based on the Field Data," Journal of the Korean Society of Safety, vol. 38, no. 2, pp. 104-111, 2023. DOI: 10.14346/JKOSOS.2023.38.2.104.

[ACM Style]

박병노, 김경화, and 김재훈. 2023. A Study on Determining the Optimal Replacement Interval of the Rolling Stock Signal System Component based on the Field Data. Journal of the Korean Society of Safety, 38, 2, (2023), 104-111. DOI: 10.14346/JKOSOS.2023.38.2.104.

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