摘要
车轮多边形磨损是地铁车辆运营过程中经常出现的现象,该现象易导致车辆和轨道结构发生异常振动。针对国内某地铁线路,在现场测试车轮多边形磨损状态基础上,通过测试对比有、无车轮多边形磨损的车辆通过地铁线路减振式钢弹簧浮置板道床段和非减振普通整体道床段时的轨道振动加速度,研究地铁车轮多边形磨损状态对轨道振动大小和减振特性的影响。结果表明:调查的地铁线路列车车轮存在13阶~17阶多边形磨损,其粗糙度平均水平为21.3 d B re 1μm;当存在车轮多边形磨损的列车通过浮置板轨道时,钢轨、弹条、轨枕、道床、隧道壁测点的垂向振动加速度均方根值分别为105.09 m/s2、154.41 m/s2、13.04 m/s2、8.16 m/s2、0.028 m/s2,与无车轮多边形磨损列车通过时相比,振动水平分别增大了137.5%、145.3%、105.4%、111.9%、75.0%。车轮多边形磨损对浮置板轨道的道床板及其以上部件振动水平的影响比对普通整体道床轨道的更显著,对浮置板轨道隧道壁振动的影响则小于对普通整体道床轨道隧道壁的影响。存在车轮多边形磨损的车辆通过浮置板轨道时,通过频率为61 Hz^104 Hz,易激发轨道的整体垂向弯曲共振模态,引起道床板振动幅值过大。在运行列车有、无13阶~17阶多边形磨损时,钢弹簧浮置板轨道减振量分别为29.33 d B和35.11 d B,车轮多边形磨损的存在降低浮置板轨道的减振效果。
The severe vibration of vehicles and track components induced by polygonal wear of wheels becomes quite common during the traveling period of metro vehicles.Roughness around the wheels’circumference of vehicles running in a domestic metro line was investigated.Vibration accelerations of components for the steel spring floating slab track were measured when a train with polygonal wheels passed.Another train with normal wheels was selected to pass through the track in the same operating condition.To analyze the influence of the polygonal wear of wheels on the vibration characteristics of the floating slab track,the vibration accelerations of the components for the common monolithic track were also measured.The results show that the dominant harmonic orders of the polygonal wear wheels are 13-17.An average roughness level of the polygonal wheels in the wavelengths of 13-17 orders is about 21.3 dB re 1μm.Root-mean-square values of vertical vibration accelerations for the inner railhead,elastic bar of fastener systems,sleeper,track bed and tunnel are 105.09,154.41,13.04,8.16 and 0.028 m/s2 respectively when the train with polygonal wheels passes through the floating slab track.The vibration level has increased by 137.5%,145.3%,105.4%,111.9%and 75.0%respectively relative to the train with normal wheels passing through the monolithic track.The influence of the polygonal wear of the wheels on the vibration level of floating slab track’s road-bed and the above components is more significant than that on the monolithic track.While the influence on the vibration level of the tunnel wall of the floating slab track is less than that of the monolithic track.The floating slab track system’s vertical bending resonance modal is easily excited by the wheel polygonal exciting frequency(61 Hz-104 Hz).And the track slab’s vibration amplitude is markedly enlarged.When the train with polygonal wheels and the train with normal wheels passing through,the floating slab track’s mitigation values are 29.33 dB and 35.11 dB respect
作者
温士明
李伟
朱强强
杨晓璇
温泽峰
WEN Shiming;LI Wei;ZHU Qiangqiang;YANG Xiaoxuan;WEN Zefeng(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)
出处
《噪声与振动控制》
CSCD
2018年第4期116-122,共7页
Noise and Vibration Control
基金
国家重点研发计划资助项目(2017YFB1201100)
牵引动力国家重点实验室自主课题资助项目(2015TPL_T01)
关键词
振动与波
车轮多边形磨损
钢弹簧浮置板轨道
振动加速度
减振效果
vibration and wave
polygonal wear of wheels
steel spring floating slab track
vibration acceleration
mitigation effect
