摘要
本文针对地铁B型车辆轴箱弹簧的可靠性问题,以某线路12列车1152个弹簧为研究对象,以FC1级芯轴断裂失效率不超过0.0001 FPKM为目标,提出一种集成RAMS、故障树分析(FTA)与全生命周期成本(LCC)的系统分析方法。通过建立RAMS指标模型,识别出8个最小割集,确定芯轴设计缺陷及高刚度材料缺陷为高风险因素;LCC分析表明,橡胶部件是主导失效部件,其分配失效率达0.00689 FPKM。芯轴的材料与结构缺陷是导致其失效的关键因素,据此提出基于蠕变量的状态维护策略,在保证可靠性的同时降低维护成本。该方法实现了安全性与经济性的协同优化,适用于轨道交通关键部件及其他复杂工程系统的可靠性设计与成本管控。
This paper addresses the reliability problems of axle box springs in metro B-type vehicles.Taking 1152 springs from 12 trains on a specific line as the research object,and based on the FC1-level safety target of a core shaft fracture failure rate no more than 0.0001 FPKM,it proposes a systematic analysis method that integrates RAMS,Fault Tree Analysis(FTA),and Life Cycle Cost(LCC).By establishing a RAMS index model,it identifies eight minimal cut sets and determines core shaft design defects and highstiffness material defects as high-risk factors.LCC analysis indicates that rubber components are the dominate failures components,with an allocated failure rate of 0.00689 FPKM.The study results indicate that the core shaft material and structure are the primary factors in the key failure mode.Therefore,the study proposes a condition-based maintenance strategy based on creep for rubber components,which reduces maintenance costs while ensuring core shaft reliability.This method achieves synergistic optimization between safety and economy,serving as a reference for reliability design and cost control of key rail transit components and other complex engineering systems.
作者
廖林林
邦小华
邓春林
周凌昊
LIAO Linlin;BANG Xiaohua;DENG Chunlin;ZHOU Linghao(Nanchang Rail Transit Group Co.,Ltd.,Operation Branch,Nanchang 333000,China)
出处
《客车技术与研究》
2026年第2期44-48,共5页
Bus & Coach Technology and Research
