To evaluate the vibration reduction effect of urban express,similar sections with essentially the same line conditions were studied.Different vibration reduction measures and corresponding common overall track bed sections were tested on-site to study the vibration reduction effect of urban express vibration reduction measures.Through the time domain,frequency domain,and one-third octave analysis of the measured data,the vibration reduction measures and maximum Z-vibration level(VLZmax)of the ordinary section of the tunnel wall were obtained,and the vibration reduction effects of different vibration reduction measures were compared.The vibration acceleration of the tunnel wall at the measuring point and the ground vibration were analyzed in one-third of an octave to obtain the propagation attenuation of the vibration.The results show that the three vibration reduction measures reduced vibration.The vibration reduction of the double-layer nonlinear vibration reduction fastener was 7.3 dB;the vibration reduction was 16.2 dB for the vibration damping pad floating plate and 19.7 dB for the steel spring floating plate.
维普
万方数据