地铁列车运行引起远场低频振动响应预测研究

PDF(2730 KB)

振动与冲击 ›› 2017, Vol. 36 ›› Issue (4) : 198-202.

论文

孙晓静1, 袁扬2, 马蒙1, 刘维宁1

作者信息 +

Prediction of metro train-induced low frequency vibration responses in far field

SUN Xiaojing1,YUAN Yang2,MA Meng1,LIU Weining1

Author information +

文章历史 +

摘要

精密仪器对工作环境的振动要求通常有微振、低频等特点，因此准确预测分析列车振动对精密仪器的影响具有一定的难度。本文结合北京地铁16号线规划通过北京大学西门的工程案例，首次在频域内采用两位校准法进行了远场低频微振动的定量预测研究。研究过程中，首先利用实测钢轨振动加速度时程计算得到模拟地铁列车荷载；随后建立北京地铁4号线校准模型，利用实测隧道壁和地表的振动响应对输入荷载、模型参数选择进行校核，确保了模型的预测精度；最后采用校核过的建模方法建立地铁16号线预测模型进行低频振动预测。结果表明：利用本文方法得到的地铁列车振动荷载及振动预测模型可以较准确的进行远场低频振动响应预测；地铁16号线地铁采用钢弹簧浮置板后，北大新建实验楼外预测点10-20Hz频段的振动满足仪器振动要求，但10Hz以下频段的振动仅满足VC-C标准，需进行实验室或仪器隔振处理。

Abstract

Since the micro vibration in low frequency range has significant influence on precision instrument,to predict the low frequency vibration impact induced by metro trains becomes a challenge problem.
Taking the case of Beijing Metro Line 16 passing below Peking University as an example,quantitative prediction of metro train-induced low frequency vibration responses in far field was researched in this paper by using a two-position calibration method. In the research,the simulated train loads were firstly obtained by frequency-hold transforming with the measured rail acceleration. Then,the FEM model of Beijing Metro Line 4 was established,and the input load and parameters were calibrated by compared with the measured data collected from tunnel wall and ground surface. Finally,the FEM model of Line 16 was established to predict low frequency vibration effects. The results show that (1) the simulated train loads and the FEM model can provide sufficient prediction accuracy in low frequency range. (2) in the case of Beijing metro line 16 passing below Peking Laboratory Building,the steel-spring-floating-slab is able to provide great vibration isolation performance,which can meet the required limit of instrument in the range of 10-20 Hz,but in the range of 0-10 Hz,the vibration is just under the VC-C limited standard; therefore,in the range of 0-10 Hz,extra treatments are needed on buildings and instruments.

导出引用

孙晓静1, 袁扬2, 马蒙1, 刘维宁1. 地铁列车运行引起远场低频振动响应预测研究[J]. 振动与冲击, 2017, 36(4): 198-202

SUN Xiaojing1,YUAN Yang2,MA Meng1,LIU Weining1. Prediction of metro train-induced low frequency vibration responses in far field[J]. Journal of Vibration and Shock, 2017, 36(4): 198-202

参考文献

[1] Office of Planning and Environment, Federal Transit Administration (FTA), U.S. Transit noise and vibration impact assessment[S]. USA, 2006.
[2] 中华人民共和国环境保护部. 环境影响评价技术导则——城市轨道交通[S]. 北京, 2008.
[3] 王另的，张斌，户文成，等. 北京地铁环境振动预测模型[J]. 城市轨道交通研究. 2013, 16(6): 101-106. （Wang Lingdi, Zhang Bin, Hu Wencheng, et al. Prediction model for metro-induced environment vibration in Beijing[J]. Urban Mass Transit, 2013, 16(6): 101-106(in Chinese)）
[4] Balendra T, Chua K H, Lo K W, et al. Steady-state vibration of subway-soil-building system[J]. Journal of Engineering Mechanics, ASCE. 1989, 115(1): 145-162.
[5] Clouteau D, Arnst M, Al-Hussaini T M, et al. Free field vibrations due to dynamic loading on a tunnel embedded in a stratified medium[J]. Journal of Sound and Vibration. 2005, 283(1-2): 173-199.
[6] Yang Y B, Hung H H. Soil vibrations caused by underground moving trains[J]. Journal of Geotechnical and Geoenvironmental Engineering. 2008, 134(11): 1633-1644.
[7] 马龙祥. 基于周期-无限结构的车轨耦合及隧道-地层结构振动分析模型研究[D]. 北京: 北京交通大学, 2014.
[8] Wolf S. Potential low frequency ground vibration (< 6.3 Hz) impacts from underground LRT operations[J]. Journal of Sound and Vibration. 2003, 267(3): 651-661.
[9] Gupta S, Liu W F, Degrande G, et al. Prediction of vibrations induced by underground railway traffic in Beijing[J]. Journal of Sound and Vibration. 2008, 310(3): 608-630.
[10] 孙晓静. 地铁列车振动对环境影响的预测研究及减振措施分析[D]. 北京交通大学, 2008.
[11] 刘更. 结构动力学程序设计[M]. 北京: 国防工业出版社, 1993.
[12] 楼梦麟，贾旭鹏，俞洁勤. 地铁运行引起的地面振动实测及传播规律分析[J]. 防灾减灾工程学报. 2009(03): 282-288.（Lou Menglin, Jia Xupeng, Yu Jiepeng. Field measurement and analysis of gound vibration induced by subway trains [J]. Journal of disaster prevention and mitigation engineering. 2009(03): 282-288(in Chinese)）