The research on environment vibration due to Subway with rail pads of frequency-dependent stiffness

摘要

Based on Vehicle-Track Coupling Dynamics and the spectrum analysis technique of the Finite Element Method, a frequency-domain method of environment vibration due to subway is put forward and frequency-range distribution of ground acceleration is discussed. Compared with the measured data, the result shows that after considering frequency-dependent stiffness of rail pad, the error is less than 0.3dB in the frequency range of 0-30 Hz, but it is up to 11.8 dB in the frequency range of 50-100 Hz. And the frequency-domain distribution of ground vibration changes too. Thus, the frequency-dependent stiffness of rail pads is not negligible in the prediction of environment vibration generated by subway.