地铁常用减振轨道钢轨横向振动特性测试分析
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摘要
研究目的:地铁常用减振型轨道结构由于采用不同的轨道横向限位方式,改变了钢轨的横向振动特性。为研究不同减振措施对钢轨横向振动特性的影响,本文对国内某城市地铁2号线常用减振型轨道结构进行钢轨横向加速度导纳和横向振动沿纵向的衰减率的测试分析。研究结论:(1)在频率100 Hz以下,减振垫浮置板道床的非刚性横向支承使得钢轨横向加速度导纳幅值大于普通DZⅢ-1型扣件整体道床,而钢弹簧浮置板轨道钢轨横向加速度导纳幅值在50 Hz以下大于DZⅢ-1型扣件整体道床;(2) GJ-Ⅲ型减振扣件的采用使得钢轨有着相对较低的横向弯曲共振频率,钢弹簧浮置板道床和减振垫浮置板道床的水平限位方式减弱了浮置板与基底的横向耦合,改变了200 Hz以下钢轨横向振动沿纵向的衰减率;(3) GJ-Ⅲ型减振扣件使得钢轨横向衰减率在中心频率2 500 Hz以下均小于DZⅢ-1轨道,并维持在较小的范围内,不利于减小钢轨横向振动产生的声辐射;(4)本研究成果对目前常用减振型轨道结构中钢轨横向振动特性的研究具有参考价值。
Research purposes:The common vibration-damping track structure of the metro adopts different track transverse limit modes,which changes the transverse vibration characteristics of the rail.In order to study the influence of different damping measures on the transverse vibration characteristics of the rail,this paper tests and analyzes the transverse acceleration admittance of the rail and the attenuation of the transverse vibration along the longitudinal direction of the commonly used vibration-damping track structure of Metro Line 2 in a certain city.Research conclusions:(1) At a frequency below 100 Hz,the non-rigid transverse support of the floating pad track bed of the damping pad makes the transverse acceleration admittance amplitude of the rail larger than that of the ordinary DZⅢ-1 fastener integral track bed,and the transverse acceleration admittance amplitude of the steel spring floating plate track rail below 50 Hz is larger than the DZⅢ-1 type fastener monolithic bed.(2) The GJ-Ⅲ type vibration-damping fastener is used to make the rail have a relatively low transverse bending resonance frequency.The horizontal limit of the steel spring floating plate track bed and the damping pad floating plate track bed weakens the transverse coupling between the floating plate and the base,and changes the longitudinal attenuation rate of the transverse vibration of the rail below 200 Hz.(3) The GJ-Ⅲ type vibration-damping fastener makes the transverse attenuation rate of the rail less than the DZⅢ-1 orbit at the center frequency of 2500 Hz and is maintained in a small range,which is not conducive to reducing the acoustic radiation generated by the transverse vibration of the rail.(4) The research results have reference value for the research on the transverse vibration characteristics of rails in commonly used vibration-damping track structures.
Research purposes:The common vibration-damping track structure of the metro adopts different track transverse limit modes,which changes the transverse vibration characteristics of the rail.In order to study the influence of different damping measures on the transverse vibration characteristics of the rail,this paper tests and analyzes the transverse acceleration admittance of the rail and the attenuation of the transverse vibration along the longitudinal direction of the commonly used vibration-damping track structure of Metro Line 2 in a certain city.Research conclusions:(1) At a frequency below 100 Hz,the non-rigid transverse support of the floating pad track bed of the damping pad makes the transverse acceleration admittance amplitude of the rail larger than that of the ordinary DZⅢ-1 fastener integral track bed,and the transverse acceleration admittance amplitude of the steel spring floating plate track rail below 50 Hz is larger than the DZⅢ-1 type fastener monolithic bed.(2) The GJ-Ⅲ type vibration-damping fastener is used to make the rail have a relatively low transverse bending resonance frequency.The horizontal limit of the steel spring floating plate track bed and the damping pad floating plate track bed weakens the transverse coupling between the floating plate and the base,and changes the longitudinal attenuation rate of the transverse vibration of the rail below 200 Hz.(3) The GJ-Ⅲ type vibration-damping fastener makes the transverse attenuation rate of the rail less than the DZⅢ-1 orbit at the center frequency of 2500 Hz and is maintained in a small range,which is not conducive to reducing the acoustic radiation generated by the transverse vibration of the rail.(4) The research results have reference value for the research on the transverse vibration characteristics of rails in commonly used vibration-damping track structures.
引文
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[3]徐宁,王志强,张攀,等.谐振式浮轨扣件减振性能测试研究[J].材料开发与应用,2014(6):22-26.Xu Ning,Wang Zhiqiang,Zhang Pan,etc.Research on Vibration Reduction Performance Test of Resonant Floating Rail Fasteners[J].Development and Application of Materials,2014(6):22-26.
[4]De Man A.P.Dynatrack:A Survey of Dynamic Railway Track Properties and Their Quality[J].Journal of Biological Chemistry,2002(2):1245-1249.
[5]EN 15461:2008+A1:2010,Railway Applications.Noise Emission.Characterization of the Dynamic Properties of Track Selections for Pass by Noise Measurements[S].
[6]周广庆.地铁常用轨道结构振动传递特性理论和试验分析[D].北京:北京交通大学,2015.Zhou Guangqing.Theory and Experimental Analysis of Vibration Transfer Characteristics of Common Track Structures in Metro[D].Beijing:Beijing Jiaotong University,2015.
[7]Kostovasilis D.,Thompson D.J.,Hussein M.F.M.The Effect of Vertical-lateral Coupling of Rails Including Initial Curvature[C]//International Congress on Sound and Vibration,2015.
[8]Wu T.X.,Thompson D.J.Application of a Multiplebeam Model for Lateral Vibration Analysis of a Discretely Supported Rail at High Frequencies[J].Journal of the Acoustical Society of America,2000(3 Pt1):1341-1344.
[2]孙方遒,谷爱军,刘维宁.钢轨长实体模型在不同频段的振动及传递特性分析[J].铁道学报,2013(2):81-86.Sun Fangqiu,Gu Aijun,Liu Weining.Analysis of Vibration and Transmission Characteristics of Rail Long Solid Model in Different Frequency Bands[J].Journal of the China Railway Society,2013(2):81-86.
[3]徐宁,王志强,张攀,等.谐振式浮轨扣件减振性能测试研究[J].材料开发与应用,2014(6):22-26.Xu Ning,Wang Zhiqiang,Zhang Pan,etc.Research on Vibration Reduction Performance Test of Resonant Floating Rail Fasteners[J].Development and Application of Materials,2014(6):22-26.
[4]De Man A.P.Dynatrack:A Survey of Dynamic Railway Track Properties and Their Quality[J].Journal of Biological Chemistry,2002(2):1245-1249.
[5]EN 15461:2008+A1:2010,Railway Applications.Noise Emission.Characterization of the Dynamic Properties of Track Selections for Pass by Noise Measurements[S].
[6]周广庆.地铁常用轨道结构振动传递特性理论和试验分析[D].北京:北京交通大学,2015.Zhou Guangqing.Theory and Experimental Analysis of Vibration Transfer Characteristics of Common Track Structures in Metro[D].Beijing:Beijing Jiaotong University,2015.
[7]Kostovasilis D.,Thompson D.J.,Hussein M.F.M.The Effect of Vertical-lateral Coupling of Rails Including Initial Curvature[C]//International Congress on Sound and Vibration,2015.
[8]Wu T.X.,Thompson D.J.Application of a Multiplebeam Model for Lateral Vibration Analysis of a Discretely Supported Rail at High Frequencies[J].Journal of the Acoustical Society of America,2000(3 Pt1):1341-1344.