地铁环境振动源强测试与评价标准分析  

Measurement and Evaluation of Environmental Vibration Source Strength of the Subway

作　　者：张凌 雷晓燕[1] 刘全民 冯青松[1] ZHANG Ling;LEI Xiaoyan;LIU Quanmin;FENG Qingsong(Engineering Research Center of Railway Environment Vibration and Noise,Ministry of Education,East China Jiaotong University Nanchang,330013,China)

机构地区：[1]华东交通大学铁路环境振动与噪声教育部工程研究中心

出　　处：《振动．测试与诊断》2020年第1期89-94,205,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51478184,51368020);江西省教育厅科学技术资助项目(GJJ160480)

摘　　要：实测南昌地铁1号线隧道内约200趟列车通过邻近非减振与减振断面的振动响应。基于不同振动评价标准,从统计角度分析了不同车次列车运行对时域和频域的影响、测点位于隧道壁不同高度对振动源强值及钢弹簧浮置板减振量评价的影响。分析结果表明:钢弹簧浮置板隧道壁上的减振效果明显,但浮置板本身的振动响应大幅增加。不同车次对各测点低频段及隧道壁高测点影响较大,但对Z振级影响较小。振动在隧道壁上低频段有所放大。由隧道壁低测点测得的最大Z振级最适合评价地铁源强值,南昌地铁实测源强值为76.66 d B。不同高度测点及不同评价标准对浮置板减振量评价有较大影响,建议采用低测点最大Z振级评价浮置板减振量。The vibration response of approximately 200 trains is measured when they go through the adjacent non-vibration and vibration reduction section in Nanchang No.1 metro line.The data are analyzed in terms of different vibration evaluation standards.The vibration of the tunnel wall is significantly reduced with a steel spring floating slab,but that of the plate itself increased greatly.The variety of train trips more substantial influence on the low-frequency section and the tunnel wall height measurement points than that on the z-direction vibration.The wall′s vibration is magnified during the low-frequency band.The source strength of Nanchang metro is measured 76.66dB at the low point on the tunnel wall according to its maximum z-direction vibration(VL zmax),which best fits the evaluation.Since assessment differs when the measurement height and standards are changed,VL zmax is recommended to evaluate the vibration reduction of the floating slab.

关 键 词：地铁隧道 振动 源强 浮置板 统计分析 

分 类 号：TH113[机械工程—机械设计及理论] U211[交通运输工程—道路与铁道工程]