摘要
针对国内某地铁线路某些区段沿线的建筑物振动与二次辐射噪声严重现象,将轨道原来铺设的普通扣件改造为浮轨扣件,并在跨中钢轨轨腰位置加装阻尼器以降低振动噪声的影响。通过测量列车运营时间内的振动和噪声数据,分析列车通过改造前后线路时的轨道振动、车辆振动和噪声、建筑物振动与二次辐射噪声特性。结果表明:与改造前普通扣件轨道相比,改造后浮轨扣件轨道的钢轨、道床和隧道壁垂向振动加速度有效值分别降低8%,70.6%和71.4%,隧道壁振动降低最显著,由隧道壁垂向振动加速度评估的轨道减振效果为8.28 dB;转向架区域和车内最大声压级降低3.6%和3.4%;昼间建筑物振动和二次辐射噪声降低18.4%和22.0%。车辆、轨道、建筑物的振动与二次辐射噪声的主频均与轮轨系统P2共振频率接近,是引起车辆、轨道和建筑物振动的主要原因之一。
Because of the problem that residents along a subway often complain about excessive vibration noise,the conventional fasteners originally used were reconstructed into floating rail fasteners to reduce the im-pact of vibration and noise.The characteristics of track vibration,vehicle vibration and noise,building vibration and secondary noise are analyzed by measuring the vibration and noise when the train passes through the section before and after reconstruction.As compared with the conventional fastener track before transformation,the root mean square values of the vertical vibration accelerations of the rail,track bed,and tunnel wall of the float-ing rail fastener track are reduced by 8%,70.6%,and 71.4%respectively,and the reduction of tunnel wall vi-bration is the most significant,and the track vibration reduction effect by the tunnel wall vertical vibration is 8.28 dB.The maximum sound pressure level in the bogie area and in the interior is reduced by 3.6%and 3.4%.The average vibration levels of buildings and the secondary radiation noise in the daytime are reduced by 18.4%and 22.0%.The main frequency of vehicle,track and building vibration and secondary noise is highly close to the P2 resonance frequency of the wheel-rail system,which is one of the main reasons for the vehicle,track and building vibration.The research results of this paper provide a greatly important reference for controlling the vi-bration and noise problems caused by the subway.
作者
何况
李铁斌
周志军
肖新标
池茂儒
陶功权
HE Kuang;LI Tiebin;ZHOU Zhijun;XIAO Xinbiao;CHI Maoru;TAO Gongquan(State Key Laboratory of Traction Power,Southwest Jiaotong University Chengdu,610031,China;Zhengzhou Metro Group Co.,Ltd.Zhengzhou,450000,China;China Railway First Group Co.,Ltd.Xi′an,712000,China;China Railway First Group Xinyun Engineering Co.,Ltd.Xianyang,712099,China)
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2023年第4期717-724,829,830,共10页
Journal of Vibration,Measurement & Diagnosis
基金
四川省自然科学基金资助项目(2022NSFSC1914)
四川省科技计划资助项目(2023YFQ0091)
中国合格评定国家认可委员会科技项目(2022CNAS15)。
关键词
浮轨扣件
轨道振动特性
车辆振动和噪声
建筑物振动
二次辐射噪声
floating rail fastener
track vibration characteristics
vehicle vibration and noise
building vibra‐tion
secondary noise
