Life Cycle Risk Assessment of Urban Rail Equipment Based on Reliability Analysis
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 4
Abstract
［Objective］ The high reliability of urban rail transit system equipment is the cornerstone and guarantee for maintaining the safe and stable operation. Due to the rapid increase in operating mileage and the continuous expansion of network line capacity in recent years, the operational risks of urban rail transit are increasing every day, and the impact of reliability on safety risks is receiving increasing attention from the industry. ［Method］ Based on the impact of lifecycle events on reliability, urban rail transit equipment is divided into lifecycle stages (operation and maintenance phase). According to historical failure data, a data statistical model assisted by a mechanism model is established, and relevant reliability indicators are characterized through Minitab software. Based on the risk matrix method, the mapping relationship between reliability and lifecycle stages is characterized, and an equipment risk assessment model considering lifecycle stages is established. ［Result & Conclusion］ Taking the vehicle bogie wheelset axle box assembly as a case study, according to the vehicle specialized maintenance content and cycle requirements, the daily operation stages are categorized into four periods: stable operation, early failure, late failure, and replacement; the failure interval time is tested for fitting, and the three-parameter Weibull distribution is selected to represent its reliability characteristic function; each phase is mapped and assigned values through the reliability characteristic function. Based on the risk matrix method, the risk assessment levels of the vehicle bogie wheelset axle box assembly at each stage are obtained, and then the risk assessment results for each stage are output respectively. Risk levels for each stage are marked as R5, R3, R1, and R1.
Authors and Affiliations
Junzhe WANG, Lin ZHU, Zhigang LIU, Yijun TAO, Yuanchun HUANG
Keywords
Related Articles
- EP ID EP766619
- DOI 10.16037/j.1007-869x.2025.04.012
- Views 14
- Downloads 0
Analysis of the Digital-Intelligent Development of Medium and Low Capacity Rail Transit System
Objective With the rapid development of rail transit technology and intelligent improvement of urban public transportation, the digital and intelligent concept extends and spreads widely in urban rail transit system, gra...
Research and Application of Train Communication Network Based on Time-sensitive Networking
Objective TCN (train communication networks) has complex topologies and requires high real-time transmission capabilities. Currently, train data transmission mainly relies on TRDP (train real-time data protocol) for carr...
Optimization of Design Parameters of Ground Grouting Waterproof Curtain in Water-Rich Mixed Granite Stratum
Objective Construction of new tunnel in water-rich mixed granite stratum is significantly affected by groundwater, so ground pre-grouting is usually adopted to form a waterproof curtain in order to reduce the effect of g...
Railway Track Identification and Extraction Based on Improved Convolutional Neural Network
Objective Prevention and protection of foreign objects intrusion into railway becomes a hot research topic, and the division of intrusion areas requires detection of the track location. In order to determine the track lo...
Peck Formula Modification of and Engineering Application in Small Radius Curve Shield Tunneling Construction
Objective In the urban rail transit line planning, curved tunnels, and even small radius curved tunnels are often chosen due to influencing factors such as building foundations, underground pipelines, and weak soil layer...