2万t重载列车制动与起动条件下轮轨动力特性试验研究  

Experimental Study on Wheel-rail Dynamic Characteristics of 20 000 t Heavy Haul Train Under Braking and Starting Conditions

作　　者：唐永康[1] 张大伟[2] 马战国 TANG Yongkang;ZHANG Dawei;MA Zhanguo(Shuohuang Railway Development Co.Ltd.,Suning Hebei 062350,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu Sichuan 610031,China;Railway Engineering Research Institute,China Academy of Railway Sciences Group Co.Ltd.,Beijing 100081,China)

机构地区：[1]朔黄铁路发展有限责任公司,河北肃宁062350 [2]西南交通大学牵引动力国家重点实验室,四川成都610031 [3]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2018年第10期103-106,139,共5页Railway Engineering

基　　金：国家自然科学基金(51478399);高速铁路轨道技术国家重点实验室开放基金(2016YJ001)

摘　　要：为探明长编组、大轴重运输条件下车辆和轨道的动力相互作用问题,基于现场试验方法,研究了2万t重载列车制动与起动条件下的轮轨动力特性,初步掌握了大轴重重载列车制动与起动条件下轮轨作用力、轨道结构位移和振动加速度的响应特征和变化规律,揭示了重载列车制动与起动状态对轮轨性能影响的差异。研究结果表明:列车制动对轮轨垂向力和轨道结构振动加速度的影响较大,其影响随制动时间的增加而逐渐减小;列车起动过程中轮轨垂向力和轨道结构振动加速度随起动时间的增加而增大;列车制动和起动对轮轨横向力及轨道结构位移的影响不大;由于列车制动加速度大于起动加速度,列车制动时的轮轨作用力、轨道结构位移和振动加速度均比起动时要大。In order to evaluate the dynamic interactions between vehicles and tracks under the condition of heavy haul transport,the wheel-rail dynamic characteristics of a 20 000 t heavy haul train under braking condition and starting condition were studied by site tests.The response characteristics and variation laws of wheel-rail force,displacement and vibration acceleration of track structure under braking condition and starting condition were obtained.The different inf luences of braking condition and starting condition on wheel-rail performance were revealed.The results show that train braking has a great inf luence on vertical wheel-rail force and vibration acceleration of track structure,which decreases with the increase of braking time but increases with the increase of starting time.The lateral wheel-rail force and displacement of the track structure are slightly affected by the braking condition or starting condition.The wheel-rail force,displacement and vibration acceleration of track structure during the process of train braking are greater than those during the process of train starting.

关 键 词：重载铁路 轮轨动力特性 大轴重 试验研究 起动 制动 

分 类 号：U213.2[交通运输工程—道路与铁道工程]