一种新型辙叉的动力学特性分析  

Dynamic Characteristics Analysis for a New-type of Frog

作　　者：司道林[1,2] 王猛[1,2] 王树国[1,2] 葛晶[1,2] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081 [2]高速铁路轨道技术国家重点实验室,北京100081

出　　处：《铁道建筑》2017年第1期40-43,共4页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划(2014G002-E)

摘　　要：介绍了一种新型轮缘承载式辙叉,该辙叉主线钢轨连续,不存在有害空间,寿命与区间线路钢轨相同。轮对通过此辙叉支线时需经历特殊的轮载转换,首先轮载由踏面转移至轮缘,随后轮缘逐渐抬高,待与钢轨顶面等高后跨越主线钢轨,最后恢复踏面承载并逐渐降低。为分析此种辙叉的动力学特性,建立了动力学模型,分析了货车、机车通过辙叉时的动力学响应。结果表明:轮缘承载后滚动圆半径增加,促使轮对向下股钢轨偏移,形成较大的轮轨横向荷载;轮载由踏面转移至轮缘顶部再恢复至踏面过程中,未见明显冲击,各项指标满足安全限值要求;新型辙叉的结构可行,参数选择合理,可满足行车要求。This paper introduced a new-type of flange bearing frog.The stock rail of this frog is continuous without harmful space.Therefore,the stock rail would have the same life as the rails in sections.The load would be transferred from tread to flange when the wheels pass through the branch rail of frog,then the wheels would be lifted to the same high level as the normal running surface of stock rail to cross the railhead.The load is transferred to tread again and the wheels reduce gradually.In order to analyze the dynamic characteristics of this frog,the model of vehicle/frog was put forward.The results show that the wheels would shift laterally obviously because of increasing of running radius when the flange bears the load,and the severe lateral load would be lead.The impact is insignificant during the load transferring,and every index satisfies the safety limit.This frog structure and parameters are reasonable.It can satisfy the running requirements.

关 键 词：轨道工程 道岔 轮缘承载式辙叉 数值计算 动力学 轮载转换 

分 类 号：U213.62[交通运输工程—道路与铁道工程]