浮置板轨道双层弹性单元垂向参数匹配研究  

Vertical parameter matching of double-layer elastic unit of floating slab track

作　　者：王树国 杜香刚 张茉颜 刘伟斌 WANG Shuguo;DU Xianggang;ZHANG Moyan;LIU Weibin(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;National Key Laboratory of High Speed Railway Track System,China Academy of Railway Sciences Corporation Limited System,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [2]中国铁道科学研究院集团有限公司高速铁路轨道系统全国重点实验室,北京100081

出　　处：《中南大学学报(自然科学版)》2025年第3期1223-1233,共11页Journal of Central South University:Science and Technology

基　　金：中国铁道科学研究院集团有限公司基金资助项目(2023YJ202);国家自然科学基金资助项目(52208449)。

摘　　要：为获取浮置板轨道双层弹性单元垂向参数的合理匹配关系,以钢弹簧浮置板轨道为研究对象,基于有限元软件建立钢弹簧浮置板谐响应模型和车辆-钢弹簧浮置板轨道动力耦合模型,从时频域角度分析浮置板轨道扣件和钢弹簧的刚度及阻尼间匹配关系对轨道隔振性能和安全性能的影响。研究结果表明,扣件和钢弹簧的垂向参数匹配作用主要影响轨道系统的隔振性能和钢轨位移,其中当扣件刚度小于2×10^(7)N/m,改变钢弹簧刚度对隔振率基本没有影响,当扣件刚度小于3×10^(7)N/m时,最高隔振率与钢弹簧刚度呈正比,当扣件刚度大于3×10^(7)N/m时,最高隔振率与钢弹簧刚度呈反比;当扣件刚度小于2×10^(7)N/m时,钢轨位移随着扣件刚度的变化基本不受扣件阻尼的影响,而当扣件刚度大于2×10^(7)N/m时,随着扣件阻尼的增加,扣件刚度对钢轨位移的影响越显著。随扣件刚度与钢弹簧刚度比值增大,轨道结构的最高隔振率先迅速增加后保持不变,而随着钢弹簧刚度和钢弹簧阻尼乘积的增加,浮置板轨道最低隔振率和支反力峰值会存在一个快速增加阶段,建议扣件刚度和钢弹簧刚度的比值大于2.22。研究结果可进一步为浮置板轨道参数优化和减振性能提升提供参考。In order to obtain a reasonable matching relationship between the vertical parameters of the doublelayer elastic units(fasteners and vibration isolators)of the floating slab track,the steel spring floating slab track was chosen as the research object.Based on finite element software,a harmonic response model of the steel spring floating slab track and a vehicle-steel spring floating slab track coupling dynamic model were established.The effects of parameters such as the stiffness and damping of floating slab track fasteners and steel springs on track vibration isolation performance and safety performance were analyzed from a time-frequency domain perspective.The research results show that the vertical parameter matching effect of fasteners and steel springs mainly affects the vibration isolation performance of the track system.When the stiffness of the fastener is less than 2×10^(7) N/m,changing the stiffness of the steel spring has a negligible effect on the vibration isolation rate.When the stiffness of the fastener is less than 3×10^(7) N/m,the highest vibration isolation rate is proportional to the stiffness of the steel spring.When the stiffness of the fastener is greater than 3×10^(7) N/m,the maximum vibration isolation rate is inversely proportional to the stiffness of the steel spring.When the fastener stiffness is less than 2×10^(7) N/m,the rail displacement changes with the fastener stiffness and is hardly affected by the fastener damping.When the fastener stiffness is greater than 2×10^(7) N/m,as the fastener damping increases,the influence of fastener stiffness on rail displacement becomes more significant.As the ratio of fastener stiffness to steel spring stiffness increases,the maximum vibration isolation of the track structure first increases rapidly and then stabilizes.As the product of steel spring stiffness and steel spring damping increases,there is a rapid increase stage in the minimum vibration isolation rate and the peak support reaction force of the floating slab track.It is recommende

关 键 词：浮置板轨道 减振性能 扣件 钢弹簧 参数匹配 

分 类 号：U213.2[交通运输工程—道路与铁道工程]