Vibration measurement and analysis of an elevated station of Dongguan-Shenzhen intercity railway

The vibration of intercity railway has the subject of increasing concern in recent years with the development of high-speed railway systems. For studying the vibration difference when the train arrived, and passed the elevated station. The field measurement of Chang’ an station of Dongguan-Shenzhen intercity railway was carried out. Measuring points in three directions were deployed to waiting hall and platform and the vibration in different regions of the station was tested. Then, the vibration characteristics when the train arrived, left and passed the elevated station were analyzed. The analysis included vibration acceleration level, spectrum and the one-third octave band spectral. The results are as follows. When the train passes through the station, the vibration acceleration generated is far greater than that of the train arriving and leaving the station, but the vibration duration is shorter than that of the train entering and leaving the station. The peak frequency of vibration acceleration is in the range of 55～70 Hz. The figure of vertical vibration acceleration has a maximum value when the train passing the station, and the corresponding peak frequency is 55 Hz. The value of the maximum vertical Z vibration level caused by train passing the station are close to the limit value. In the process of vibration transmission of the elevated station, vibration amplification may occur in the low frequency bands (this phenomenon is most obvious when the train passed the elevated station). The vibration of train will attenuate with the increase of distance to vibration center, which will be more obvious in the high frequency band. The vibration acceleration of the waiting hall does not continuously decrease with the increase of the distance to the track center line, which is related to the location of the vibration transmission structure (column) of the elevated station, and the vibration acceleration can be amplified at specific distances. © 2022, Central South University Press. All rights reserved.