长大坡道货运列车周期性制动下车轮温升分析  

Analisis of wheel temperature rise of freight trains on long ramp under periodic braking

作　　者：毛保华 龚超奇[1] 张桐 杨彦强 MAO Baohua;GONG Chaoqi;ZHANG Tong;YANG Yanqiang(Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport,Beijing Jiaotong University,Beijing 100044,China;Integrated Transportation Research Centre of China,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]综合交通运输大数据应用技术交通运输行业重点实验室,北京100044 [2]北京交通大学中国综合交通研究中心,北京100044

出　　处：《铁道科学与工程学报》2020年第4期980-987,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(71971021)。

摘　　要：周期性制动是货运列车在长大下坡道运行时的一种常见操纵策略,该过程中车轮会因频繁抱闸而温度上升,过高的温度会危及行车安全。为提高列车运行的安全性,考虑列车周期性制动对热流密度和对流换热系数2个车轮温升关键因素的影响,基于ANSYS软件建立二维车轮“运动—温度”有限元分析模型。对比已有研究实验数据,模型的数字实验结果表明模型有效,且得到:在设定前提下,无电制动力损失时,车轮温度不超过350℃;1台机车电制动力损失和电制动力完全损失时,坡道分别超过?23.7‰和?12.5‰后车轮温度会超过400℃;减压量每增加10 kPa,车轮最高温度平均增加13.6℃;制动限速每降低5 km/h,车轮最高温度平均降低16.2℃。研究结果可为线路坡道设计及电制动失效后的运营组织提供参考。Periodic braking is a common operational strategy for freight trains running on the long downhill ramp,during which wheel temperature will rise due to frequent air braking,and the excessive temperature can endanger the driving safety.In order to improve the safety of train operation,considering the effect of periodic braking on heat flow density and convective heat transfer coefficient,this paper establishes a two-dimensional wheel“movement-temperature”finite element analysis model based on ANSYS software.Compared with the existing experiment results,the model is verified by carrying out numerical experiments.Under the premise of the paper’s setting,the results show that:the wheel temperature will not exceed 350℃with no electric braking force loss and the wheel temperature will exceed 400℃when the ramp exceeds?23.7‰and?12.5‰respectively for half and complete electric braking power loss.When the pressure reduction increases by 10 kPa,the maximum temperature of the wheel goes up by 13.6℃on average,and while the braking speed limit decreases by 5 km/h,the maximum temperature of the wheel goes down by 16.2℃averagely.The results can provide reference for the route design of ramp and the operation organization after electric braking failure.

关 键 词：货运列车 周期性制动 车轮温升 列车管减压量 制动限速 

分 类 号：U270[机械工程—车辆工程]