摘要
为研究考虑柔性轮对旋转效应时车轮多边形磨耗对轮轨力的影响,结合有限元法和多体动力学理论,建立了带有车轮多边形磨耗的车辆轨道刚柔耦合动力学模型,编写了车辆轨道耦合动力学程序及欧拉坐标系下的柔性轮对计算程序,并在此基础上计算了刚性轮对、忽略旋转效应的柔性轮对和考虑旋转效应的柔性轮对存在多边形磨耗时的轮轨力,分析了多边形阶数、磨耗程度对轮轨力的影响。研究表明:在考虑柔性轮对旋转效应的车轮多边形磨耗影响下,轮轨力响应存在主频分离现象,对轮轨力的波动影响较明显;当列车运行速度为300 km/h,车轮多边形阶数为24~28阶时,轮轨垂向力出现了拍振现象且波动较大,相对于轨枕位置存在约0.5π的相位超前;当多边形磨耗严重时,高阶多边形引起的2倍频能量上升,对轮轨力的波动幅值影响较大。
In order to study the inf luence of wheel polygon wear on wheel-rail force in the condition of considering the f lexible wheelset rotating effect,combined with the f inite element method and multi-body dynamics theory,the vehicle-track rigid-f lexible coupling dynamics model with wheel polygon wear was established,and the program of vehicle-track coupling dynamics and the program of f lexible wheelset in Euler coordinate system were written.On this basis,this paper calculated the wheel-rail forces of the rigid wheelset,f lexible wheelset ignoring rotation effect and f lexible wheelset considering rotation effect when polygon wear presenting.The inf luences of the polygon order and wear degree on the wheel-rail force were analyzed.The research results show that there is a dominant frequency separation phenomenon in the wheel-rail force response under the inf luence of wheel polygonal wear when considering the f lexible wheelset rotating effect,which has obvious inf luence on the f luctuation of wheel-rail force.When the running speed of the train is 300 km/h and the wheel polygon order is between 24 and 28,the wheel-rail vertical force has the phenomenons of beat vibration and f luctuation,which has a leading phases about 0.5πrelative to the rail sleeper position.When the polygon wear is severe,the frequency-doubled energy caused by the high-order polygon increases,which has a great inf luence on the f luctuation amplitude of the wheel-rail force.
作者
崔潇
姚建伟
孙丽霞
CUI Xiao;YAO Jianwei;SUN Lixia(Postgraduate Department,China Academy of Railway Sciences,Beijing 100081,China;Railway Science and Technology Research and Development Center,China Academy of Railway Sciences Group Co.Ltd.,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2019年第6期140-145,共6页
Railway Engineering
基金
中国铁路总公司科技研究开发计划(2017J003-B)
关键词
车轮多边形磨耗
旋转效应
仿真分析
刚柔耦合
频率分离
Wheel polygon wear
Rotating effect
Simulation analysis
Rigid-f lexible coupling
Frequency separation
