小阻力扣件节点数量对钢轨纵向阻力的影响  

Influence of Node Number of Small Resistance Fastener on Rail Longitudinal Resistance

作　　者：闫子权[1] 李彦山[1] 李子睿[1] 张欢[1] YAN Ziquan LI Yanshan LI Zirui ZHANG Huan(Railway Engineering Research Institute, China Academy of Railway Sciences, Beijing 100081, China)

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《铁道建筑》2017年第2期113-115,119,共4页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划(2015G001-I)

摘　　要：结合我国高速铁路小阻力扣件系统的现场应用情况,首先采用有限元仿真软件对不同类型小阻力扣件的节点数量与钢轨纵向阻力之间的关系进行了研究。结果表明:不同扣件节点数时测得的钢轨纵向阻力换算成单扣件节点后的钢轨纵向阻力略有差异,其主要原因是单扣件节点所承受的钢轨重力有所变化,但该因素影响很小;钢轨纵向阻力与扣件节点数量之间存在线性关系。然后通过室内试验对加载位置、加载方式、钢轨滑移量等因素进行了分析,确定采用拉钢轨的加载方式,钢轨滑移量按3 mm控制进行小阻力扣件钢轨纵向阻力测试。结果显示:不同扣件节点数时测得的钢轨纵向阻力换算成单扣件节点后的钢轨纵向阻力基本相当。试验结果与理论分析结果相吻合。Combing with the field application of the small resistance fastening systems in high speed railways,the relationship between the number of fastener nodes and rail longitudinal resistance with different types of small resistance fasteners was studied by using finite element simulation software.The result show that the measured rail longitudinal resistance with different fastener nodes is slightly different from the transformed rail longitudinal resistance with a single fastener node,which is mainly due to the changing rail gravity born by a single fastener node,while this factor has little effect,and there is a linear relationship between the rail longitudinal resistance and the number of fastener nodes.The factors such as loading position,loading mode and rail slippage were analyzed by laboratory tests,the loading mode of pulling rail was determined,the rail longitudinal resistance test with small resistance fasteners was carried out by controlling rail slippage within 3 mm.The results indicate that the measured rail longitudinal resistance with different fastener nodes is basically same as the transformed rail longitudinal resistance with a single fastener node,and the experimental results agree well with the theoretical analysis.

关 键 词：高速铁路 钢轨纵向阻力 理论分析 试验研究 小阻力扣件 加载方式 钢轨滑移量 

分 类 号：U213.4[交通运输工程—道路与铁道工程]