中国铁道科学2023，Vol.44Issue(6)：136-142,7.DOI:10.3969/j.issn.1001-4632.2023.06.14
线性涡流制动对钢轨温升的影响
Influence of Linear Eddy Current Brake on Rail Temperature Rise
摘要
Abstract
To study the influence laws of different levels of eddy current braking on rail temperature rise,based on the principle of linear eddy current braking,the theoretical formulae of eddy current braking force and rail temperature rise are derived using the law of energy conservation and the skin effect formula of conductors,with the combination of the data of braking force test and heat transfer theory.According to the theoretical formulae,the finite element method is used to establish a rail temperature rise model,and the temperature variation of different parts of the rail after a train applies emergency eddy current braking are analyzed.According to the minimum time interval between the designed train and the current train in operation of Beijing-Shanghai high-speed railway,the rail temperature variation of multiple trains under repeated eddy current braking is calculated,respectively.The results show that using the law of energy conservation to derive the theoretical formulae for eddy current braking force and the rail temperature rise not only ensures the calculation accuracy,but also simplifies the calculation process.After emergency braking of a train,the temperature rise at the top of the rail is the highest,while the temperature changes at the waist and the bottom of the rail are minimal during the braking process.When multiple trains repeatedly apply eddy current braking in the same section,the higher the braking level,the shorter the train interval,and the greater the cumulative temperature rise of rail.When the maximum service braking is repeatedly applied under the condition of minimum train interval,the maximum rail temperature rise meets the requirements of relevant standards for line maintenance.关键词
线性涡流制动/钢轨温升/制动力/温度场仿真/高速铁路Key words
Linear eddy current brake/Rail temperature rise/Braking force/Temperature field simulation/High-speed railway分类
交通工程引用本文复制引用
高立群,王立宁,丁福焰,韩晓辉..线性涡流制动对钢轨温升的影响[J].中国铁道科学,2023,44(6):136-142,7.基金项目
中国国家铁路集团有限公司科技研究开发计划课题(P2019J023) （P2019J023）
中国铁道科学研究院集团有限公司院基金课题(2022YJ236) （2022YJ236）
