车辆段运用库上盖建筑减振措施效果分析  

Analysis of Effect of Vibration Reduction Measures for Over-track Building of Operation Depot

作　　者：徐浩能 刘庆杰[1] 涂勤明 张新亚 冯青松[1] XU Haoneng;LIU Qingjie;TU Qinming;ZHANG Xinya;FENG Qingsong(State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;Guangzhou Metro Design and Research Institute Co.,Ltd.,Guangzhou 510010,China)

机构地区：[1]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,南昌330013 [2]广州地铁设计研究院股份有限公司,广州510010

出　　处：《噪声与振动控制》2025年第1期248-255,共8页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51868024);国家自然科学基金资助项目(52068029)。

摘　　要：以某车辆段为研究对象,实测运用库行车引起的源强、盖板及上盖建筑的垂向振动,对比不同断面振动规律的变化;建立轨道-大地-车辆段-上盖建筑三维有限元模型,结合车辆轨道动力学模型计算加载所需轮轨力,将轮轨力加载至有限元模型钢轨上求解振动响应,再用实测数据加以验证,在此基础上研究不同扣件刚度及不同楼板厚度工况下上盖建筑的振动变化,研究结果表明:加减速状态下,源强各处振动主频带较匀速状态下更宽;盖板上各测点主频为31.5 Hz,上盖建筑主频为63 Hz;减振扣件在20~125 Hz内有较好的减振效果;同一楼层板厚每增加20 mm,上盖建筑Z振级对应衰减0.84~1.46 dB。A metro depot was taken as the research object,and the vertical vibrations of the source intensity,the cover plate and the over-track building caused by the operation depot were measured,and the changes of the vibration law of different sections were compared.A three-dimensional finite element model of track-subgrade-depot-over-track building was established.The wheel-rail force required for loading was calculated by combining the vehicle-track dynamics model.Then,the wheel-rail force was added to the rail of the finite element model to solve the vibration response,which was verified later by the measured data.On this basis,the vibration changes of the over-track building under different damping fastener stiffness and different floor thickness conditions were studied.The results of the research show that the main frequency band of vibration at source intensity under acceleration and deceleration condition was wider than that under the uniform speed condition.The main frequency at the measurement points on the cover plate is 31.5 Hz,and the main frequency of over-track building is 63 Hz.The damping fastener has a good damping effect in the range of 20-125 Hz.For every 20 mm increase in the thickness of the same floor,the corresponding attenuation of the Z-vibration level of over-track building is 0.84-1.46 dB.

关 键 词：振动与波 运用库 现场实测 上盖建筑 有限元仿真 

分 类 号：U231[交通运输工程—道路与铁道工程]