Dynamic Analysis of Test Frame of Railway Subgrade Dynamic Response Test System

Zeng Liangcai, Feilong Zheng, Anyu Zhang, Gangsheng Kai


In this paper, we take the railway subgrade
dynamic response test system as the study object, the
laboratory test reaction frameâ??s model factors were
analyzed through the finite element analysis software
MSC.Patran/Nastran. The former six-order original
frequencies and vibration modes of the frame were
caculated and evaluated in detail. Then we studied its
transient response under two working conditions: when itâ??s
fully loaded and suddenly unloaded, and the deformation
displacement curves of the key points of the frame were
obtained. These results provide a basis for the detailed study
to the mechanical behavior of the frame and setting the
proper working frequencies of the hydraulic servo
excitation cylinder to avoid the resonance.


Frame; Dynamic analysis; Railway subgrade; Original frequency

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International Journal of Online and Biomedical Engineering (iJOE) – eISSN: 2626-8493
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