Damage analysis of EMU frame considering randomness under different working conditions

Damage analysis of EMU frame considering randomness under different working conditions

Yizhe Zhang Qiang Li  

Beijing Jiaotong University, Key Laboratory of Vehicle Advanced Manufacturing, Measuring and Control Technology, Beijing 100044, China

Corresponding Author Email: 
30 June 2018
| Citation



The target of this study was to investigate the stress changes of frame when the EMU train passed the mainline, or the curve line in the EMU section, or the branch line of turnouts. In this regard, the author adds a MEMS gyroscope and GPS equipment to the conventional dynamic stress test, and proposes a working condition identification scheme based on curvature determination to obtain line information. Considering the randomness of the damage, in the analysis process, the equivalent stress is regarded as a random variable, and its distribution characteristics are discussed to make the results more real and reliable. The results of quantitative analysis of the damage indicated that some working conditions on the mainline contribute to the frame damage to a certain extent, and when the train passes through small turnouts and curves in the depot at a low speed, the amplitude of stress is several times higher than the high speed straight line working condition. The findings of this study may serve as a basis for further establishment of the load spectrum of working conditions, and provides references for fine design in the aspect of vehicle reliability.


EMU, frame, dynamic stress test, working condition identification, fatigue strength evaluation, damage randomness

1. Introduction
2. Frame dynamic stress test and working condition characteristics extraction
3. Damage assessment scheme optimization
4. Frame damage under different working conditions
5. Conclusion

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