重载铁路列车运行引起的环境振动试验分析  

Experimental Analysis on Environmental Vibration Induced by Heavy Haul Railway Train Travelling

作　　者：陈迎庆[1] CHEN Yingqing(Energy Saving ＆ Environmental Protection ＆ Occupational Saving and Health Research Institute, China Academy of Railway Sciences, Beijing 100081, China)

机构地区：[1]中国铁道科学研究院节能环保劳卫研究所,北京100081

出　　处：《铁道建筑》2016年第9期148-150,共3页Railway Engineering

摘　　要：列车以不同速度通过某重载铁路桥梁区段时,测试得到距离铁路线路不同距离处的环境振动振级水平及频域特性。应用MATLAB软件分析得到环境振动水平与距离、速度的变化关系公式。考虑时间累计对环境振动的影响,使用四次方振动剂量值探讨速度和距离对振动的影响,并分析其与Z计权振级变化的关系。试验结果表明：列车速度60~100 km/h时重载列车运行速度每增加10 km/h,最大Z振级增加1~2 d B;距离线路120 m内距离加倍最大Z振级增加2~3d B;重载列车通过桥梁区段在25~50 Hz频带间出现特征频率;用四次方振动剂量值可对不同位置处的环境振动进行评价。The environment vibration level and frequency domain characteristics at different distance from railway line were obtained when the train passes through a bridge section of heavy haul railway with different speeds.The formulation of relation between environment vibration level and the variation of distance and velocity was concluded by MATLAB software analysis.By considering the effects of time accumulation on environmental vibration,the influence of velocity and distance on vibration was discussed by using the fourth power vibration dose value and the relationship between influence and Z weight vibration level change was analyzed.The results showed that the maximum Z vibration level VL_Z value increases by 1~2 dB with running speed of the heavy haul train increasing by10 km/h when the train speed is 60~100 km/h,the maximum Z vibration level VL_Z value increases by 2~3 dB when the distance doubles within 120 m from the heavy haul railway line,the characteristic frequencies appear between 25 Hz and 50 Hz band when the heavy haul railway passes through the bridge section and the environmental vibration at different location should be evaluated through the fourth power vibration dose value.

关 键 词：重载铁路 环境振动 频域特性 四次方振动剂量值 

分 类 号：U239.4[交通运输工程—道路与铁道工程] TB53[理学—物理]