制动与桥梁上拱激励对城轨列车的动力学影响
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摘要
城轨列车运行线路及运行工况复杂多变,若用传统动力学模型,无法得到更为实用的研究结果。为此,建立六节编组城轨列车动力学模型,综合考虑制动工况以及城轨列车通过高架线路时的桥梁徐变上拱长波不平顺情况,研究在该内外耦合激励下的车辆动力学性能。基于微元法思想,计算了制动工况下阻力转矩与时间历程的关系,得到贴近实际的运行综合工况。研究结果表明:桥梁上拱长波激励对列车安全性有显著影响;因而提出一种综合安全性系数用以评价列车安全性;制动工况下,不同制动缸压力对列车轮对磨耗数及磨耗位置均有一定影响。
The operating lines and conditions of urban rail trains are complex and changeable.If the traditional dynamic model is used,more practical research results cannot be achieved.For this purpose,six-marshalling of the urban rail vehicle dynamics model is established.Considering the braking condition and the creep and arch long wave irregularity of the urban rail train upon passing through the elevated line,the vehicle dynamic performance under the coupling excitation is studied.Based on the idea of the microelement method,the relationship between the resistance torque and the time under the braking condition is calculated,and the comprehensive operating conditions close to the real process are obtained.The research results show that the arch long wave excitation on the bridge has a significant impact on the train safety.Therefore,an ample safety factor is proposed to evaluate the train safety.Under different braking conditions,the brake cylinder pressure has a certain effect on both the wheel wear amount and the wear location.
The operating lines and conditions of urban rail trains are complex and changeable.If the traditional dynamic model is used,more practical research results cannot be achieved.For this purpose,six-marshalling of the urban rail vehicle dynamics model is established.Considering the braking condition and the creep and arch long wave irregularity of the urban rail train upon passing through the elevated line,the vehicle dynamic performance under the coupling excitation is studied.Based on the idea of the microelement method,the relationship between the resistance torque and the time under the braking condition is calculated,and the comprehensive operating conditions close to the real process are obtained.The research results show that the arch long wave excitation on the bridge has a significant impact on the train safety.Therefore,an ample safety factor is proposed to evaluate the train safety.Under different braking conditions,the brake cylinder pressure has a certain effect on both the wheel wear amount and the wear location.
引文
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[2]姜东,陈红亮,费庆国,等.随机车辆荷载作用下大跨悬索桥振动响应研究[J].中国科技论文,2013,8(11):1131-1135.JIANG Dong,CHEN Hongliang,FEI Qingguo,et al.Dynamic response of large suspension bridge to stochastic traffic loads[J].China Sciencepaper,2013,8(11):1131-1135.(in Chinese)
[3]秦震,周素霞,孙晨龙,等.减振器特性参数对高速动车组临界速度的影响研究[J].机械工程学报,2017,53(6):138-144.QIN Zhen,ZHOU Suxia,SUN Chenlong,et al.Influence of hydraulic shock absorber characteristic parameters on the critical speed of high-speed trains[J].Journal of Mechanical Engineering,2017,53(6):138-144.(in Chinese)
[4]周素霞,薛蕊.缓和曲线线型对地铁车辆动力学参数的影响[J].北京交通大学学报,2015,39(3):24-29.ZHOU Suxia,XUE Rui.Influence of transition curves act on subway wheel-rail wear[J].Journal of Beijing Jiaotong University,2015,39(3):24-29.(in Chinese)
[5]周素霞,薛蕊.地铁线路超高对轮轨磨耗的影响[J].北京交通大学学报,2015,39(1):101-107.ZHOU Suxia,XUE Rui.Influence of superelevation of subway line act on wheel-rail wear[J].Journal of Beijing Jiaotong University,2015,39(1):101-107.(in Chinese)
[6]白雪.踏面形状对地铁车辆动力学性能及轮轨磨耗影响研究[D].成都:西南交通大学,2015.BAI Xue.Study on the influence of the wheel profile on metro vehicle dynamics and wear[D].Chengdu:Southwest Jiaotong University,2015.(in Chinese)
[7]黄运华,李芾,傅茂海,等.踏面形状对地铁车辆动力学性能的影响[J].机车电传动,2007(1):39-41.HUANG Yunhua,LI Fu,FU Maohai,et al.Influence of tread shape on dynamic performance of metro vehicles[J].Electric Drive for Locomotives,2007(1):39-41.(in Chinese)
[8]杨亮亮,罗世辉,傅茂海,等.惰行和制动工况下重载列车曲线通过数值模拟[J].铁道学报,2015(11):52-57.YANG Liangliang,LUO Shihui,FU Maohai,et al.Numerical simulation on curve negotiating of heavy haul train under ldling and braking conditions[J].Journal of the China Railway Society,2015(11):51-57.(in Chinese)
[9]程海涛,侯霄.制动工况下车辆的动力学分析[J].铁道车辆,2000,38(9):1-6.CHENG Haitao,HOU Xiao.Dynamics analysis on railway cars under braking working conditions[J].Rolling Stock,2000,39(9):1-6.(in Chinese)
[10]徐庆元,林青腾,方子匀,等.徐变上拱对桥上纵连无砟轨道线路动力影响[J].铁道工程学报,2018,35(1):56-61.XU Qingyuan,LIN Qingteng,FANG Ziyun,et al.Influence of creep camber of bridge on dynamic characteristics of railway with longitudinal connected ballastless track on bridge[J].Journal of Railway Engineering Society,2018,35(1):56-61.(in Chinese)
[11]许锡昌,周伟,陈善雄.武广铁路客运专线32m单跨简支梁的徐变上拱特征分析[J].铁道标准设计,2010(2):78-80.XU Xichang,ZHOU Wei,CHEN Shanxiong.Analysis of creep characteristics of 32msingle span simply supported beam on Wuhan-Guangzhou Passenger Dedicated Line[J].Railway Standard Design,2010(2):78-80.(in Chinese)
[12]邬平波,曾京.确定车辆系统线性和非线性临界速度的新方法[J].铁道车辆,2000,38(5):1-4.WU Pingbo,ZENG Jing.A new method to determine linear and nonlinear critical speed of the vehicle system[J].Rolling Stock,2000,35(5):1-4.(in Chinese)
[13]史炎.新型独立车轮转向架动力学研究[J].中国科技论文,2017,12(22):2521-2525.SHI Yan.Dynamics of a new type independent wheel bogie[J].China Sciencepaper,2017,12(22):2521-2525.(in Chinese)
[14]铙忠.列车牵引计算[M].北京:中国铁道出版社,1996:33-38.RAO Zhong.Train traction calculation[M].Beijing:China Railway Publishing House,1996:33-38.(in Chinese)
[15]陈双喜,邓小军.高速动车组在直接转矩控制下的机电耦合模型[J].铁道科学与工程学报,2015,12(6):1277-1282.CHEN Shuangxi,DENG Xiaojun.Electromechaical coupling model of high-speed emu with direct torque control[J].Journal of Railway Science and Engineering,2015,12(6):1277-1282.(in Chinese)
[16]钟明全,阳光,王旭军,等.PC板梁徐变上拱对高速行车舒适性的影响分析[J].桥梁建设,2007(6):26-29.ZHONG Mingquan,YANG Guang,WANG Xujun,et al.Analysis of influence of creeping camber of PCplate grider bridge on riding comfort of high-speed traveling vehicle[J].Bridge Construction,2007(6):26-29.(in Chinese)
[17]米静,刘永健,刘剑.车-桥耦合振动冲击效应对简支板的影响[J].中国科技论文在线,2010,5(7):516-521.MI Jing,LIU Yongjian,LIU Jian.Impact influence of vehicle-bridge coupled vibration on simply-supported slab[J].Sciencepaper Online,2010,5(7):516-521.(in Chinese)