Application of Reverse FTF in Metro Door Failure Analysis

摘要

Door system is a key subsystem of metro train, and its reliability is related to the maintenance strategy of Metro Corporation and the safety of passengers. On the basis of failure mode effects criticality analysis (FMECA) and fault tree analysis (FTA), t reverse FTA-FMECA (FTF) was proposed for the reliability analysis of metro door. Firstly, the qualitative analysis of FTA was applied to door failure to obtain bottom events. Then, based on the historical failure data and criticality matrix, the quantitative analysis of FMECA was conducted on the bottom events and, as a result, the hazard degree of each bottom event was determined. At last, the failure modes which have great damage on door system were found out according to the hazard degree. The result shows that the proposed method can provide reference and technical support for designing door system and improving its reliability.