In this paper, a problem for safety of bogie frame of subway vehicle under overload situation has been
discussed. Firstly, the structure of bogie frame and service condition are introduced to explain the reason caused fatigue
failure. Then, the testing points are selected in terms of the structure of bogie frame, the characteristics of processing
technique, load transfer path and the operation situation of subway vehicle. Based on them, the experiment for acquiring
stress data during peak of service is done. After that, the process of fatigue analysis is presented with rainflow cycle
counting method using the data above. From the Miner rule, nominal stress method and Goodman relation, the formula for
fatigue strength assumed infinite life is obtained. Finally, the results of fatigue analysis according to the approach above is
presented in the form of table. The research work provides guidance for maintaining the bogie frame.