关键词: 轨道电路, 故障模式影像分析, 故障树, 可靠性

Abstract: According to the reliability issues of ZPW-2000A type jointless audio frequency-shift modulated track circuit system, the method of combining Failure Modes and Effect Analysis（FMEA） and Fault Tree Analysis（FTA） is proposed for research and analysis of the system reliability. The system is analyzed and defined, and the FMEA table is completed. All possible failure modes, failure effects, fault detection methods and remedial measures are obtained. The fault tree is built. The minimal cut sets of the fault tree are got, and the qualitative and quantitative analyses of the fault tree are conducted. The weak links of the system are located by qualitative analysis. The fail probability of roof events, important degree of each minimal cut sets and reliability index are gained through the quantitative analysis. The validity of the reliability analysis method is verified by comparison with the relevant technical requirements.

Key words: track circuit, Failure Modes and Effect Analysis（FMEA）, Fault Tree Analysis（FTA）, reliability