城市轨道交通减振措施效果评价的实证研究

Study on the Effect Evaluation of Vibration Reduction Measures of Urban rail Transit

为评价城市轨道交通减振措施的减振效果,对广州地铁的B型车和L型车的三条线路不同减振措施开展振动测试,对振动信号进行了时域和频域分析。研究表明:隧道壁处的振动数据较道床和轨道波动性更小,适合作为减振措施的评价量;在4~40Hz频段,减振效果顺序为特殊减振>高等减振>中等减振,在40~200Hz频段,中等减振>高等减振>特殊减振;给出了适合钢弹簧浮置板道床的减振量的计算频段区间4~40Hz,验证了其减振效果的可靠性。

In order to evaluate the effect of vibration reduction of urban rail transit,vibration tests are carried out on three lines of Guangzhou metro type B and L,and the time domain and frequency domain analysis of vibration signals are carried out.The study shows that the volatility of the vibration data of the tunnel wall is less than that of the bed and track,and is suitable for the evaluation of the vibration reduction measures.In the range of 4~40Hz,the order of vibration damping effect is special damping > high damping > medium damping,in the range of 40~200Hz frequency band,medium damping> high damping > special dumping;In this paper,the calculation frequency range of vibration damping of a steel-spring floating slab track bed is given,and the reliability of its vibration reduction is verified.