小号码道岔尖轨转换的仿真计算及验证  

Simulation Calculation and Verification of Switch Rail Conversion for Small⁃size Turnouts

作　　者：刘高岩 闫尧 LIU Gaoyan;YAN Yao(CARS(Beijing)Railway Equipment Technology Co.Ltd.,Beijing 102202,China)

机构地区：[1]铁科(北京)轨道装备技术有限公司,北京102202

出　　处：《铁道建筑》2024年第8期25-28,共4页Railway Engineering

基　　金：中国铁道科学研究院集团有限公司基金(2021YJ262)。

摘　　要：小号码道岔自由段长度短,牵引点数量少,因此其扳动力较大。为研究尖轨动程对小号码道岔扳动力的影响,解决小号码道岔扳动力过大的问题,本文建立某小号码单开道岔曲线尖轨实体模型和有限元模型,根据尖轨实际转换过程设定其约束条件和仿真工况,对尖轨转换过程中的等效应力和扳动力进行计算,并通过现场试验来验证有限元模型的合理性。结果表明:尖轨动程越大,其等效应力和最大扳动力也越大,最大扳动力与尖轨动程成线性关系;动程的大小直接影响尖轨的整体受力状态和扳动力,在合理范围内适当减少动程可改善尖轨的使用状态;本文建立的尖轨转换模型与现场测量结果接近,合理可靠,可为道岔相关结构的设计工作提供借鉴。The length of the free section of the small-size turnout is short,and the number of traction points is small,so its pulling force is relatively large.In order to study the influence of switch rail stroke on the switching force of small-size turnouts and solve the problem of excessive switching force of small-size turnout,this paper established a solid model and finite element model of a curved switch rail of one small-size single-opened turnout.Based on the actual conversion process of the switch rail,its constraints and simulation conditions were set,and the equivalent stress and switching force during the switch rail conversion process were calculated.The rationality of the finite element model was verified through field experiments.The results show that the greater the stroke of the switch rail,the greater its equivalent force and maximum pulling force will be,and the maximum pulling force is linearly related to the stroke of the switch rail.The magnitude of the stroke directly affects the overall force state and pulling force of the switch rail,and reducing the stroke appropriately within a reasonable range can improve the usage state of the switch rail.The switch rail conversion model established in this article is close to the on-site measurement results,which is reasonable and reliable,and can be used to guide the design work of turnout related structures.

关 键 词：小号码道岔 动程 有限元分析 尖轨 扳动力 

分 类 号：U213.6[交通运输工程—道路与铁道工程]