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时间:2020-05-20
《铁路高架车站车致振动实测与理论分析-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第49卷第4期西南交通大学学报Vo1.49No.42014年8月JOURNALOFSOUTHWESTJIAOTONGUNIVERSITYAug.2014文章编号:0258-2724(2014)04-0612-07DoI:10.3969/j.issn.0258-2724.2014.04.008铁路高架车站车致振动实测与理论分析李小珍,刘全民,张迅,张志俊(西南交通大学土木工程学院,四川成都610031)摘要:为了研究铁路高架车站不同区域的环境振动规律,针对某客运专线高架车站,分别在轨道梁跨中、办公间、候车厅布置了三向振动测点,测试了高速动车组以正线速度通过时高架车站内不同
2、区域的环境振动水平,从振动加速度时程、振动加速度级、频谱三方面分析了试验数据;利用车一线-桥耦合振动理论,研究了轨道梁动力响应和列车走行性.研究结果表明:办公间的z振级达80.7dB,超出规范限值0.7dB;高架车站环境振动以竖向为主;办公问竖向振动持时比水平振动长15%;候车厅楼板的横向振动比轨道梁振动持时长1.03S;振动在由轨道梁向车站楼板传递的过程中,高频振动比低频衰减快.关键词:高架车站;车桥耦合;环境振动;测试;振动加速度级中图分类号:U291.6文献标志码:AMeasurementandTheoreticalAnalysisofVehicle-Induce
3、dVibrationonElevatedRailwayStationLIXiaozhen,LIUQuanmin,ZHANGXun,ZHANGZh驰n(SchoolofCivilEngineering,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Inordertostudytheenvironmentalvibrationindifferentregionsofelevatedstations,measuringpointsformeasuringthevibrationinthreedirection
4、s(,Y,and)weredeployedtothemid—spanoftrackbeam,office,andwaitingroomofanelevatedstationinapassengerdedicatedrailway.Whenhigh—speedEMUs(electricmultipleunits)passedtheelevatedstationatthemainlinespeed,theenvironmentalvibrationindifferentregionsofthestationwastested,andexperimentaldataonthe
5、timehistories,levels,andfrequencyspectraofvibrationaccelerationswereanalyzed.Accordingtothevehicle—track—bridgecouplingtheory,thedynamicresponseofthetrackbeamandtherunningperformanceoftrainswereinvestigated.TheresultsshowthattheZ-weightedvibrationleveloftheofficereaches80.7dB.0.7dBhigher
6、thanthecodelimit;andtheverticalvibrationdominatestheenvironmentalvibrationoftheelevatedstation.ThedurationoftheverticalvibrationatofficecenteriS15%longerthanthatofthehorizontalvibration;andthedurationofthehorizontalvibrationofthewaitingroomis1.03Slongerthanthatofthetrackbeam.Inaddition,t
7、hehigh—frequencyvibrationattenuatesfasterthanthelow—frequencyvibrationduringthepropagationfromthetrackbeamtothestationfloor.Keywords:elevatedstation;vehicle—bridgecoupling;environmentalvibration;measurement;vibrationaccelerationleve】随着我国近年来城市化进程和区域经济的发展,城际和城市轨道交通得到了空前的发展.
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