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随着电气化铁道高速化的发展,接触网的可靠性成为铁路安全运行的一个重要因素,但它的研究只停留 在定性分析上,没有深入的定量计算。本文采用故障树演绎分析(FTA)方法,对铁路接触网系统的可靠性进行 分析和研究。以所不希望发生的故障事件作为分析的目标,找到了接触网系统存在的故障原因和机理,在大 量调研的基础上,建立了接触网系统的故障树及它的数学模型,基于Fussell下行法及最小割集法对它的可靠 性进行了定性和定量的分析。分析结果表明,腐蚀、零件的强度、磨损、疲劳、外部动态负载、强电流、污染、接触 线的张力和沿导线传播的波动速度等是造成接触网失效的主要原因,并且根据故障模式和最薄弱的环节通过 最小割集计算出了顶事件的可靠度,为接触网系统的可靠性与安全性分析和失效预测提供了一种实用的方法 和理论依据。
With the rapid development of electrified railways, the reliability of catenary has become an important factor in the safe operation of railway. However, its research has only stayed on the qualitative analysis and has not been thoroughly quantified. In this paper, fault tree deduction analysis (FTA) method is used to analyze and study the reliability of railway catenary system. Based on a lot of investigation and research, the fault tree and its mathematical model of catenary system were established based on the Fussell descent method And the minimum cut set method its qualitative and quantitative analysis of the reliability. The results show that corrosion, part strength, wear, fatigue, external dynamic load, high current, pollution, tension of contact line and wave propagation speed along the conductor are the main reasons for the failure of contact line. According to the failure mode and the most The weak link calculates the reliability of the top event by minimum cut set, which provides a practical method and theoretical basis for the reliability and safety analysis and failure prediction of catenary system.