中低速磁浮快线产生地表振动的现场测试分析

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (18) : 202-206.

论文

姜博龙，刘维宁，马蒙，孙晓静，曹容宁，李明航

作者信息 +

In-situ test and analysis of ground vibration induced by low-medium speed maglev train

JIANG Bo-long，LIU Wei-ning，Ma Meng，Sun Xiao-jing，Cao Rong-ning，Li Ming-hang

Author information +

文章历史 +

摘要

为研究中低速磁浮引起地表振动特性，在国内首条运营的长沙中低速磁浮快线某路段进行现场地表振动测试，同时测试北京地铁13号线某高架线区段地表振动作为对照工况。测试结果表明：由于轨道受均布力，磁浮快线引起的地表振动波形没有明显的周期性峰值；磁浮线路，由于轮轨分离，车辆、轨道系统的特征距离所对应的特征频率不明显，桥梁动力特性较明显；由于轮轨分离、受轨道不平顺影响较小，30~80Hz中低速磁浮存在明显优势地面振动，这部分振动主要来自导轨、轨道梁的结构振动以及线路不平顺；距线路0~40m范围内地表振动的最大Z振级，中低速磁浮快线较传统地铁高架线对应距离至少小4dB以上，且中低速磁浮快线引起地表振动在10~40m范围内均满足《城市区域环境振动标准》中的振动限值要求。

Abstract

In order to study the characteristics of ground vibration induced by low-medium speed maglev train, in-situ tests were conducted in a curve section of Changsha's first low-medium speed maglev train line in operation in China, and the result was compared to that of Beijing Metro Line 13. The results show that there is no cyclic peak in the vibration waveform of the maglev line because of the uniform force on tracks. In the maglev train, the characteristic frequency of the train-track system is less obvious but the dynamic properties of the bridge are obvious, generated by the separation of wheel system and the track system. Due to the separation of the wheel and the track and limited impact of track irregularity , low-medium speed maglev train has obvious advantage of ground vibration in 30~80Hz, which mainly comes from the vibration of the guide rail and the track beam ,as well as line irregularity. On the range of 10 m to 40 m, the VLz,max of ground generated by the maglev is over 4dB lower than that of the elevated line at the same position, and maglev line meets the vibration limit value of the “measurement method of environmental vibration of urban area”.

导出引用

姜博龙，刘维宁，马蒙，孙晓静，曹容宁，李明航. 中低速磁浮快线产生地表振动的现场测试分析[J]. 振动与冲击, 2017, 36(18): 202-206

JIANG Bo-long，LIU Wei-ning，Ma Meng，Sun Xiao-jing，Cao Rong-ning，Li Ming-hang. In-situ test and analysis of ground vibration induced by low-medium speed maglev train[J]. Journal of Vibration and Shock, 2017, 36(18): 202-206

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