阻尼谐振器对地铁线路道床板低频振动的影响
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摘要
介绍了一种在地铁线路道床板上安装阻尼谐振器以降低低频振动的方法。建立了道床系统有限元模型,分析道床板上安装阻尼谐振器的减振特性。在相同轨道条件下,对普通道床和安装阻尼谐振器的道床进行了锤击和在线振动测试,对比分析其频率响应函数。结果表明,在正常的地铁轨道条件下,与无阻尼谐振器道床相比,安装阻尼谐振器的道床板的低频振动可降低10 dB以上。
A method to reduce slab low frequency vibration by tuned slab dampers installed on metro track is introduced. By setting up a finite element model of track bed system, the performance of tuned slab damper on metro track is analyzed. Under the same orbital conditions, the ordinary track bed and the track bed with damping resonator are tested by using hammering and online vibration methods, the frequency response functions are compared and analyzed. Results demonstrate that compared with ordinary track bed without damping resonator, the metro track installed tuned slab damper can reduce low frequency slab vibration level by more than 10 dB under normal metro traffic conditions.
A method to reduce slab low frequency vibration by tuned slab dampers installed on metro track is introduced. By setting up a finite element model of track bed system, the performance of tuned slab damper on metro track is analyzed. Under the same orbital conditions, the ordinary track bed and the track bed with damping resonator are tested by using hammering and online vibration methods, the frequency response functions are compared and analyzed. Results demonstrate that compared with ordinary track bed without damping resonator, the metro track installed tuned slab damper can reduce low frequency slab vibration level by more than 10 dB under normal metro traffic conditions.
引文
[1] LIU Y Z,YU D L,ZHAO H G,et al.Review of passive dynamic vibration absorber [J].Chinese Journal of Mechanic Engineering,2007,43(3):14.
[2] BROCK J E.A note on the damped vibration absorber [J].Journal of Applied Mechanics,1946,13(4):A-284.
[3] DEN HARTOG J P.Mechanical vibration [M].New York:McGraw-Hill Book Company,1947:112-132.
[4] WEI C F.Time-domain conversion and the application research of track irregularity power spectrum [D].Chengdu:Southwest Jiaotong University,2011:26-28.
[5] ZHAI W M.Vehicle-track coupling dynamics [M].Beijing:China Railway Publishing House,1997:175-178.
[6] CHEN G.The analysis on random vibration of vehicle-track coupling system [D].Chengdu:Southwest Jiaotong University,2000:153.
[7] 刘晶波,王振宇,杜修力,等.波动问题中的三维时域粘弹性人工边界[J].工程力学,2005,22(6):46.
[8] LIU W F,LIU W N,YUAN Y.Study on isolation efficiency of floating slab track using a numerical prediction model of metro traffic induced vibrations [J].Journal of the China Railway Society,2009,34(9):81.
[9] WANG A B,QU L H,FAN Y X,et al.The key technology research of high performance damping slab mat [R].2013:1-25.
[10] WANG A B,WANG Z Q,XU N.Dynamic testing analysis report of the high performance damping slab from Guangbo station to Xinlong road of Zhengzhou metro line two[R].2015.
[11] 国家环境保护局.城市区域环境振动标准:GB 10070—1988[S].北京:中国标准出版社,1988.
[12] 国家环境保护局.城市区域环境振动测量方法:GB 10070—1988[S].北京:中国标准出版社,1988.
[2] BROCK J E.A note on the damped vibration absorber [J].Journal of Applied Mechanics,1946,13(4):A-284.
[3] DEN HARTOG J P.Mechanical vibration [M].New York:McGraw-Hill Book Company,1947:112-132.
[4] WEI C F.Time-domain conversion and the application research of track irregularity power spectrum [D].Chengdu:Southwest Jiaotong University,2011:26-28.
[5] ZHAI W M.Vehicle-track coupling dynamics [M].Beijing:China Railway Publishing House,1997:175-178.
[6] CHEN G.The analysis on random vibration of vehicle-track coupling system [D].Chengdu:Southwest Jiaotong University,2000:153.
[7] 刘晶波,王振宇,杜修力,等.波动问题中的三维时域粘弹性人工边界[J].工程力学,2005,22(6):46.
[8] LIU W F,LIU W N,YUAN Y.Study on isolation efficiency of floating slab track using a numerical prediction model of metro traffic induced vibrations [J].Journal of the China Railway Society,2009,34(9):81.
[9] WANG A B,QU L H,FAN Y X,et al.The key technology research of high performance damping slab mat [R].2013:1-25.
[10] WANG A B,WANG Z Q,XU N.Dynamic testing analysis report of the high performance damping slab from Guangbo station to Xinlong road of Zhengzhou metro line two[R].2015.
[11] 国家环境保护局.城市区域环境振动标准:GB 10070—1988[S].北京:中国标准出版社,1988.
[12] 国家环境保护局.城市区域环境振动测量方法:GB 10070—1988[S].北京:中国标准出版社,1988.