高架轨道交通列车对周围环境振动影响的试验研究

陈建国;夏禾;姚锦宝

振动与冲击 ›› 2011, Vol. 30 ›› Issue (2) : 159-163.

PDF(2327 KB)
PDF(2327 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (2) : 159-163.
论文

高架轨道交通列车对周围环境振动影响的试验研究


  • 陈建国1,2; 夏禾1; 姚锦宝1
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Experimental study on environment vibration induced by trains on viaduct

  • CHEN Jian-guo1,2; XIA He1; YAO Jin-bao1
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摘要

对北京地铁5号线高架桥上的运行列车引起周围地面振动的影响进行了实测,将测试得到的地面振动加速度数据在时域和频域内进行了分析。得到了以下结论:普通轨枕下的地面横向振级为58-100dB,竖向振级为55-91dB;梯形轨枕下的地面横向振级为62-85dB,竖向振级为60-83dB;地面横向振动随距离的衰减规律表现为先增大后减小,最大值出现在15m处的测点,衰减呈现出一定的波动性;竖向振动的衰减规律总的趋势是随着距离的增大而逐渐减小,但有一个明显的反弹区(本试验中为距离振源15m左右的范围处),且振动越大反弹越明显;梯形轨枕能够对一定频率范围内的振动起到减振效果,但是对另一频率范围的振动反而起到了放大作用,其原因是由于振动频率与梯形轨枕的自振频率产生共振而引起的;高频振动的衰减速度大于低频振动的衰减速度,远振源点的振动主要是由低频的振动引起的。

Abstract

Field measurements were carried out at Beijing No.5 Metro Line to study the ground vibrations subjected to moving trains on viaduct, Time-domain and frequency-domain analysis were executed on measured ground acceleration. It was found that, the lateral vibration level of ground under trains running on common track is 58-100dB, and the vertical vibration level is 55-91dB. However, the lateral vibration level of ground under trains running on ladder track is 62-85dB, and the vertical vibration level is 60-83dB. The attenuation of lateral vibration grows to a peak at the distance of 15m, and then reduces fluctuant with the distance. The vertical vibration reduces with the distance, and has a rebound region at the distance of 15m. The rebound value increases with the vibration level. The ladder track can reduce vibration level by filtering some frequency component, but also magnify vibration level at some frequency which is similar with the ladder track’ natural frequency. The attenuation level of high frequency is fast than low frequency. The vibration of far field is induced mainly by low frequency.

关键词

高架交通 / 列车 / 环境 / 振动 / 试验

Key words

Viaduct traffic / Train / Environment / Vibration / Experiment

引用本文

导出引用
陈建国;夏禾;姚锦宝. 高架轨道交通列车对周围环境振动影响的试验研究[J]. 振动与冲击, 2011, 30(2): 159-163
CHEN Jian-guo;XIA He;YAO Jin-bao. Experimental study on environment vibration induced by trains on viaduct[J]. Journal of Vibration and Shock, 2011, 30(2): 159-163

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