摘要
针对地铁小半径曲线地段的钢轨波磨问题,建立地铁车辆-曲线轨道空间耦合动力学模型,分析曲线半径、行车速度、轮轨摩擦系数等参数对轮轨动力特性及钢轨波磨的影响。为控制钢轨波磨发展,对地铁线路的设计、运营和维护提出了建议。结果表明:曲线半径从800 m减小至300 m时,磨耗功率均方根增大2.7倍,标准差增大85%,过小的曲线半径是钢轨波磨频发的主要原因;小半径曲线地段列车实际运营速度可以略大于设计速度,取60 km/h,使曲线处于适当的欠超高状态,能够控制轮轨磨耗和钢轨波磨发展;轮轨摩擦系数过大会加剧轮轨磨耗,易发生钢轨波磨,然而轮轨摩擦系数过小也会加剧轮轨磨耗,因此建议轮轨间保持适当的润滑状态,轮轨摩擦系数在0.3左右为宜。
For the rail corrugation issue in small radius curve section of metro,a spatial coupling dynamic model of metro vehicle-curve track was established to analyze the influences of curve radius,vehicle speed,wheel-rail friction coefficient and other parameters on wheel-rail dynamic characteristics and rail corrugation. In order to control the development of rail corrugation,some suggestions on the design,operation and maintenance of metro lines were put forward. The results show that when the curve radius decreases from 800 m to 300 m,the root mean square of wear power increases by 2.7 times and the standard deviation increases by 85%. Too small curve radius is the main reason for frequent rail corrugation. The actual vehicle speed in the small radius curve section can be slightly larger than the design speed of 60 km/h,so that the curve in an appropriate deficient superelevation state,which can control the development of wheel-rail wear and rail corrugation. With the increase of wheel-rail friction coefficient,the wear between wheel and rail is intensified,the rail corrugation is easy to occur. If the friction coefficient is too small,which will also aggravate the wear between wheel and rail. It is suggested that the friction coefficient should be maintained at about 0.3,that means the appropriate lubrication state between wheel and rail.
作者
刘堂辉
姚典
张鹏飞
冯青松
LIU Tanghui;YAO Dian;ZHANG Pengfei;FENG Qingsong(Guangzhou Metro Design and Research Institute Company Limited,Guangzhou 510010,China;Engineering Research Center of Railway Environmental Vibration and Noise of Ministry of Education,East China Jiaotong University,Nanchang 330013,China)
出处
《铁道建筑》
北大核心
2022年第3期75-79,共5页
Railway Engineering
基金
国家自然科学基金(51768023)
江西省教育厅重点项目(GJJ180290)。
关键词
地铁
钢轨波磨
数值模拟
小半径曲线
轮轨动力特性
轮轨摩擦系数
metro
rail corrugation
numerical simulation
small radius curve
wheel-rail dynamic characteristic
wheel-rail friction coefficient
