利用Periodic Fourier法研究橡胶混凝土隔振基础对轨道振动的影响  

Study on Vibration Reduction Characteristics of the CRC Foundation Using Periodic-Fourier Method

作　　者：金浩[1] 刘维宁[2] 周顺华[1] 孙晓静[2] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《噪声与振动控制》2015年第3期144-148,共5页Noise and Vibration Control

基　　金：国家自然科学基金项目(51278043);国家自然科学基金项目(51408033);高等学校博士学科点专项科研基金(20110009120023)

摘　　要：地下铁道轨道减振措施研究是一个受到持续关注的问题,本文创新性地引入橡胶混凝土隔振基础这一概念。并利用Peiodic-Fourier方法,探讨了橡胶混凝土隔振基础物理参数对钢轨振动位移的影响。研究结果表明:(1)高频激励荷载引起的钢轨位移比低频激励荷载引起的钢轨位移小;(2)橡胶混凝土隔振基础刚度越大,相应的共振频率越大,但引起的钢轨振动位移越小;(3)橡胶混凝土隔振基础阻尼越大,相应的共振频率越小,且引起的钢轨振动位移也越小。A novel type of a crumb rubber concrete（CRC）foundation was proposed for vibration reduction of railway tracks of subways. The Periodic-Fourier method was adopted to build the mathematical model and analyze the influence of different physical parameters of the CRC foundation on the vibration displacement of the rails. The results show that in comparison with the conventional foundations, the rail displacement induced by high-frequency excitation is greatly reduced,and the rail displacement induced by high-frequency excitation is smaller than that by low-frequency excitation; the larger stiffness of the CRC foundation can lead to larger resonant frequency and smaller vibration displacement of the rails; increasing the damping of the CRC foundation can reduce the resonant frequency and the vibration displacement of the rails.

关 键 词：振动与波 橡胶混凝土 地下铁道 减振 Periodic-Fourier方法 钢轨位移 

分 类 号：U231[交通运输工程—道路与铁道工程]