考虑共因失效的故障树分析方法及应用

Failure Tree Analysis Method and Application Considering Common Cause Failure

在复杂机电设备的应用中,共因失效往往是引发系统失效的重要因素。在分析β-因子共因失效模型的基础上,采用考虑共因失效的方法对地铁乘客紧急报警系统进行故障树建模和系统可靠度分析,并分别计算不考虑共因失效和考虑共因失效时系统可靠度。计算结果表明:共因失效导致系统可靠度降低,体现了考虑共因失效系统可靠度分析的必要性。

With the wide application of complex electromechanical equipment,common cause failure is often an important factor leading to system failure.In this paper,fault tree modeling and system reliability analysis are carried out for metro passenger emergency alarm system by considering common cause failure.Finally,the system reliability without considering common cause failure and the system reliability with considering common cause failure are calculated respectively.The calculation results prove that the system reliability decreases due to common cause failure,which reflects the necessity of system reliability analysis considering common cause failure.