The Open Mechanical Engineering Journal

2015, 9 : 260-265
Published online 2015 April 17. DOI: 10.2174/1874155X01509010260
Publisher ID: TOMEJ-9-260

The Experiment Study for Fatigue Strength of Bogie Frame of Beijing Subway Vehicle Under Overload Situation

Jishan Li , Jinhai Wang , Xi Li , Jianwei Yang and Haitao Wang
School of Machine-Electricity and Automobile Engineering, Beijing University of Civil Engineering Architecture, Xicheng, Beijing, 100044, P.R. China.

ABSTRACT

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.

Keywords:

Bogie frame, fatigue strength, nominal stress method, subway vehicle .