摘要
针对我国普速铁路主要运行车型的LMA,JM3,LM车轮型面与60 kg/m钢轨匹配关系不良的实际情况,根据轮轨接触关系理论,提出普速铁路钢轨打磨廓形优化设计的基本原则、总体目标、方法和步骤。选取轮轨匹配关系最差的普通客货车标准LM车轮型面,并以侧磨为主的磨耗钢轨TB60MH为基础,对300 m小半径曲线(累计通过总质量30 Mt)钢轨打磨的目标廓形进行优化设计,并通过仿真数值模拟对廓形设计效果进行评价。结果表明,廓形优化设计后,轮轨接触应力、磨耗指数、脱轨系数、轮重减载率的最大值分别减小了12%,22%,9%,3%。
In view of the poor matching relationship reality between the LMA,JM3,LM wheel profiles of main operation types of conventional speed railway in China and the 60 kg/m rail and according to the theory of wheel rail contact relationship,the basic principles,overall objectives,methods and steps of rail grinding profile optimization design for conventional speed railway were put forward.The standard LM wheel profile of ordinary passenger and freight car with the worst wheel rail matching relationship was selected,based on TB60MH rail,the main wear type of which is the side wear,the objective profile of 300 m small radius curve(cumulative passing mass of 30 Mt)rail grinding was optimized,and the profile design effect was evaluated by numerical simulation.The results show that the maximum values of wheel rail contact stress,wear index,derailment coefficient and wheel load reduction rate are reduced by 12%,22%,9%and 3%respectively after the profile optimization design.
作者
张金
俞喆
杨超
毛少虎
ZHANG Jin;YU Zhe;YANG Chao;MAO Shaohu(Metals and Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Works Department,China Railway Nanchang Group Co.Ltd.,Nanchang 330000,China;Works Department,China Railway Guangzhou Group Co.Ltd.,Guangzhou 510088,China)
出处
《铁道建筑》
北大核心
2020年第10期138-141,共4页
Railway Engineering
基金
中国铁道科学研究院基金(2018YJ098)。
关键词
普速铁路
轮轨匹配关系
数值模拟
钢轨打磨
廓形优化设计
小半径曲线
conventional speed railway
wheel rail matching relationship
numerical simulation
rail grinding
profile optimization design
small radius curve
