运营期普速铁路曲线区段异常晃车影响因素研究  

Research on the the influencing factors of abnormal vibration of conventional railway on curve during operation period

作　　者：高雅 杨飞 尤明熙 陈天然 李威霖 GAO Ya;YANG Fei;YOU Mingxi;CHEN Tianran;LI Weilin(Infrastructure Inspection Research Institute,China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China;Railway Technology Research College,China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司基础设施检测研究所,北京100081 [2]中国铁道科学研究院集团有限公司研修学院,北京100081

出　　处：《铁道科学与工程学报》2024年第4期1412-1423,共12页Journal of Railway Science and Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划(N2022G011);中国铁道科学研究院集团有限公司科技研究开发计划(2021YJ250)。

摘　　要：为分析某运营期普速铁路160 km/h速度等级曲线区段的异常晃车问题,对晃车区段的轮轨廓形进行测量,分析了晃车区段的实测车体加速度与轨道几何不平顺数据的时频特征,进一步建立了车辆-有砟轨道耦合动力学仿真模型,采用试验研究和仿真计算相结合的方式研究了轮轨匹配特性和欠过超高状态对曲线区段车辆横向稳定性的影响。结果表明:异常晃车曲线区段车体横向加速度较大,存在明显周期性振动,车体横向加速度振动空间频率为0.024 m^(-1),对应波长为42 m;晃车曲线区段内外股钢轨廓形对称性差,外股钢轨轨顶面和轨距角处磨耗更严重,与实测车轮廓形匹配时轮轨接触点在轨顶面上更为集中;与采用LM&CHN60廓形相比,采用实测轮轨廓形通过曲线时的轮对横移量更大,轮对和转向架周期性振动更明显,周期性振动空间频率为0.024 m^(-1),与异常晃车频率相同;运行速度为60 km/h时的轮轴横向力显著增加,运行速度为160 km/h时的脱轨系数和轮重减载率显著增加;在曲线半径为5000 m,超高为25 mm条件下,车辆以60 km/h和160 km/h的运行速度通过曲线时分别属于严重过超高和欠超高状态,车体横向加速度振动频率与转向架蛇行运动和车轮蛇行运动频率接近,显著影响了车辆通过曲线时的动力响应;运行速度为120 km/h时曲线区段车辆动力响应整体较小,由此可见适当的欠超高有助于提升车辆曲线通过能力;由于曲线参数的限制,建议优先采用降速通过的方式减小车辆通过该段曲线时的车辆动力响应,同时通过改善轮轨匹配关系进一步提升车辆曲线通过能力。In order to analyze the abnormal shaking of speed level of 160 km/h curve section of a conventional railway during operation period,the wheel-rail profile of the rolling section was measured.By analyzing the time-frequency characteristics of the measured vehicle acceleration and track geometric irregularity data of the abnormal vehicle vibration section,and combining with the establishment of a vehicle-ballast track coupled dynamic model,the effects of wheel-rail matching characteristics and unbalanced superelevation conditions on the lateral stability of vehicles on curve were studied.The results show that the lateral acceleration of the vehicle in the abnormal vibration curve section has a significant periodic vibration with a large amplitude.The spatial frequency of the lateral acceleration vibration of the vehicle is 0.024 m^(−1),and the corresponding wavelength is 42 m.The profile of the inner and outer rails in the abnormal vibration curve section is asymmetric,and the wear on the top surface and gauge angle of the outer rails is more severe.When matching the measured wheel profile,the wheel-rail contact points are more concentrated on the rail top surface.Compared with the LM&CHN60 profile,the lateral displacement of the wheelset is greater,and the periodic vibration of the wheelset and bogie is more obvious with measured profiles.The spatial frequency of the periodic vibration is 0.024 m^(−1),which is the same as the abnormal vehicle vibration frequency.The lateral force of the wheel axle significantly increases at a running speed of 60 km/h,and the derailment coefficient and wheel load reduction rate significantly increase at the operation speed of 160 km/h.Under the condition of a curve radius of 5000 m and a superelevation of 25 mm,when the vehicle passes through the curve at speeds of 60 km/h and 160 km/h,it belongs to a serious state of unbalanced superelevation.The lateral acceleration vibration frequency of the vehicle is close to the hunting motion frequency of the bogie the wheelset,which sig

关 键 词：普速铁路 车体异常晃动 轮轨匹配 未平衡超高 有砟轨道 曲线动力响应 

分 类 号：U213.1[交通运输工程—道路与铁道工程]