城市轨道交通车辆系统安全完整性等级指标的定量分析与分配
秦姣梅潘德敏范开江
Quantitative Analysis and Allocation of Safety Integrity Level Indexes for Urban Rail Transit Vehicle System
QIN JiaomeiPAN DeminFAN Kaijiang
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作者信息:中车青岛四方车辆研究所有限公司，266031，青岛
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Affiliation:CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd., 266031, Qingdao, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.06.040
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中图分类号/CLCN:U298∶U270
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栏目/Col:研究报告
摘要:
［目的］随着城市轨道交通列车全自动运行系统的发展应用，对城市轨道交通车辆系统的安全性提出更高要求，在新的全自动运行的运营场景下，应对城市轨道交通列车从顶层重新梳理安全需求，以确定城市轨道交通车辆关键系统的安全完整性等级。［方法］综合采用FTA(故障树分析)、风险矩阵、FMECA(故障模式影响和危害分析)方法，从列车全线系统级到车辆级、车辆子系统级逐层进行危害识别、风险分析以及定量指标分配。［结果及结论］由分析得出城市轨道交通车辆关键系统的安全需求及SIL(安全完整性等级)。牵引系统的安全功能包括紧急制动牵引切除功能、方向控制功能、牵引使能功能和制动控制功能，它们的安全完整性等级，除“紧急制动牵引切除功能”为SIL3外，其余均为SIL2；制动系统的安全功能包括整车紧急制动功能、防滑控制功能、常用制动功能和保持制动功能，它们的安全完整性等级分别为SIL4、SIL3、SIL2、SIL2；网络系统的安全功能包括保持制动功能、司机室激活功能、方向管理功能、牵引制动指令管理功能和级位管理功能,它们的安全完整性等级都为SIL2。
Abstracts:
［Objective］ Development and application of FAO (fully automatic operation) system in urban rail transit train requires higher safety of urban rail vehicle system. Under the new operation scenario where FAO needs to be confirmed, it is necessary to sort through the safety requirements for urban rail transit train from the top level, determine the SIL (safety integrity level) of the critical system in urban rail transit vehicle. ［Method］ FTA (fault tree analysis), Risk Matrix and FMECA (failure mode, effects and criticality analysis) are all used to conduct hazard identification, risk analysis, and quantitative index allocation layer by layer from the system level of entire train line to the vehicle system level, the vehicle subsystem level. ［Result & Conclusion］ The safety requirements and the SIL of urban rail transit vehicle system are obtained through analysis. The safety functions of the traction system include emergency braking traction cut off function, direction control function, traction enable function, and braking control function, except the first one belongs to SIL3, all other three functions are SIL2. The safety functions of the braking system include emergency braking function, anti-skid control function, service braking function, and brake holding function, belonging to SIL4, SIL3, SIL2, and SIL2 respectively. The safety functions of the network system include brake holding function, driver′s cabin activation function, direction management function, traction braking command management function, and level management function, all belonging to SIL2.
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