摘要:
轨道和钢轨振动引起的环境问题是影响城市轨道交通发展的主要问题之一,轨道减振器是目前轨道系统采用的主要减振措施之一,低垂向刚度减振器在保证了良好隔振作用的同时可能增加钢轨的振动,而谐振式减振器可以降低此影响。本文采用数值仿真方法,首先与在线实测数据进行拟合,采用与实测数据一致的轨道参数建立车辆-轨道-地基模型进行动力学计算,结果表明,谐振式减振器可降低轨道道床及地基振动的同时有效降低钢轨振动,包括pinned-pinned共振频率附近的振动,从而抑制钢轨波磨的产生。
Abstract:
Noises caused by track and rail vibration are one of major problems affecting urban rail transit development. Resilient rail fasteners come to be a main measure of reducing vibration and noise. Low stiffness of fastener functions well in vibration isolation, but might cause more vibration of rails, while the tuned damper floating rail fastener can make that up. In this research, the simulation is used to fit onsite measured data, then the data is used to build vehicle-track-foundation model to do the calculations.According to the results, the tuned damper floating rail fastener can reduce the vibration of trackbeds and ground as well as the vibration of steel rails including vibrations at around pinned-pinnerd frequency, so as to decrease the growth of rail corrugation.
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