Effects of train type and formation on metro operation induced environmental vibration

MA Longxiang1,2, ZHAO Ruitong1,2, GAN Yuhang1, WU Xin1, ZHANG Chaoxiang1

Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (11) : 24-30.

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (11) : 24-30.

Effects of train type and formation on metro operation induced environmental vibration

  • MA Longxiang1,2,  ZHAO Ruitong1,2,  GAN Yuhang1,  WU Xin1, ZHANG Chaoxiang1
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Abstract

In order to investigate effects of train type and formation on metro operation induced environmental vibration, the sliced finite element-infinite element coupled model and the periodic train-track coupled model were adopted to comprehensively analyze metro operation induced environmental vibration under conditions of usually used train types and formations. The analysis results showed that under conditions of different train types and formations, metro operation induced environmental vibration’s time histories, frequency spectra, 1/3 octave spectra and Z-vibration level attenuation curves of ground surface have similar trends, but their corresponding magnitudes are different; train type and formation have larger effects on low frequency environmental vibration within the frequency range of less than 5 Hz; when other factors keep unchanged, expanding a 6-compartment train into a 8-compartment one, or changing a motor car-trailer combination train into a full motor car train, or adopting type A train not type B one as the operation train cause the ground surface Z-vibration level to increase by up to 1.5 dB; the maximum effect of different combinations of metro train type and formation on ground surface Z-vibration levels can reach 3.2 dB.   

Key words

metro / environmental vibration / train type / train formation / sliced finite element-infinite element coupling model / periodic train-track coupling model

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MA Longxiang1,2, ZHAO Ruitong1,2, GAN Yuhang1, WU Xin1, ZHANG Chaoxiang1. Effects of train type and formation on metro operation induced environmental vibration[J]. Journal of Vibration and Shock, 2019, 38(11): 24-30

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