共因失效分析在轨道交通信号系统安全性计算中的应用  

Analysis of Common Cause Failure in the Safety Calculation for Railway Signaling System

作　　者：谭邵波 唐冈林 黄爱萍 TAN Shaobo;TANG Ganglin;HUANG Aiping(Zhuzhou CRRC Times Electric Co., Ltd., Zhuzhou, Hunan 412001, China)

机构地区：[1]株洲中车时代电气股份有限公司,湖南株洲412001

出　　处：《控制与信息技术》2018年第2期69-72,76,共5页CONTROL AND INFORMATION TECHNOLOGY

摘　　要：目前轨道交通信号系统设计在安全性计算中缺少共因失效(CCF)分析,导致安全评估结果过于乐观,会造成安全隐患。为此,文章提出一种共因失效分析方法,其以故障树与门作为分析对象,结合β因子法和独立性分析法对各种情况进行分析,无需建立复杂的CCF模型,简化了分析和计算过程。通过典型2取2冗余设计与门示例,证明了该分析方法能实现对安全性计算结果的进一步修正,具有很好的适用性和可操作性。CCF （common cause failure） analysis is not widely applied in current safety calculation, and this will lead to an over optimistic assessment of safety and result in potential safety hazards. This paper presented a CCF analysis method which takes the AND gates of FTA （failure tree analysis） as its analysis object and combines the β-factor method and the independent analysis method. No complex CCF model needs to be built and analyzing and computing process is simplified. An example of a typical 2 out of 2 AND redundancy design was given to prove that the method can further improve the safety assessment results and has good applicability and maneuverability.

关 键 词：共因失效 安全性计算 失效分析 β因子法 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]