中国铁道科学2018，Vol.39Issue(2)：10-17,8.DOI:10.3969/j.issn.1001-4632.2018.02.02
30t轴重重载铁路钢轨轨型和材质对比试验
Comparative Test on Shape and Material of Rail Used for Heavy Haul Railway of 30 t Axle Load
摘要
Abstract
8 kinds of rails with different types,profiles and steel grades were laid on a certain heavy haul railway for testing.Through field tests and simulation,comparative study was done concerning wheel-rail contact geometry,track structure dynamics,the dynamic performance of freight car and rail service performance etc.Analysis and comparison of rail profiles,types and steel grades were then done to propose rail selection strategies for heavy haul railway of 30 t axle load.Results show that when matching with LM profile wheel,the contact band on 60 rail deviates towards gauge corner,while those of 60N and 75N rails shift to the center part of tread and have an obviously lower contact stress.The equivalent conicity values of the measured 60,60N and 75N rail coupled with LM wheel are respectively 1.35～1.5,0.77～0.86 and 0.94～1.00 times of that of standard 75N rail.Under the total load of 8 000 t and 12 000 t,60N and 75N rails have close track structure dynamics indexes,while 60 rail has the largest values.All three kinds of rails have slight influence on the dynamic indexes of freight cars.Suggestions of using 75 kg · m-1 rail with 75N profile on heavy haul railway of 30 t axle load are given.Rails with the tensile strength of 980 MPa or above are recommended for tangent track,while those with the tensile strength of 1 300 MPa or above are recommended for curved track.For curves with small radius where rolling contact fatigue dominates,the use of bainitic rails can be promoted.关键词
30t轴重/钢轨/轨型/廓形/材质/动力学测试/重载铁路Key words
30 t axle load/Rail/Rail type/Profile/Material/Dynamic testing/Heavy haul railway分类
交通工程引用本文复制引用
张银花,李闯,俞喆,李伟,张生玉,干锋..30t轴重重载铁路钢轨轨型和材质对比试验[J].中国铁道科学,2018,39(2):10-17,8.基金项目
中国铁路总公司科技研究开发计划项目(Z2014-033,2015G004-C) （Z2014-033,2015G004-C）
