高速车辆作用下柔性轨道结构动力性能分析  

Dynamic Performance Analysis of Flexible Track Structure under the Action of High Speed Vehicle

作　　者：王相平 吴少培 李星 席世纪 丁旺才[1] 李国芳[1] WANG Xiang-ping;WU Shao-pei;Li Xing;XI Shi-ji;DING Wang-cai;Li Guo-fang(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070

出　　处：《兰州交通大学学报》2021年第6期81-88,共8页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(12162020,11962013);甘肃省自然科学基金(20JR10RA238);甘肃省高校大学生就业创业能力提升工程项目(2021);甘肃省教育厅优秀研究生“创新之星”项目(2021CXZX-584,2021CXZX-583)。

摘　　要：以某高速铁路试验段CRTSIII型板式无砟轨道为背景,基于车辆轨道耦合动力学理论,建立路基区段车辆轨道空间耦合系统动力学模型,综合考虑轨道各关键部件参振作用,探讨轨道模型对系统动力响应的影响,揭示高速车辆作用下轨道结构振动传递规律,分析柔性轨道结构上车辆动力学性能变化.结果表明,引入柔性轨道,充分考虑轨下结构弹性变形和参振作用能更准确反映高速车辆轨道系统动力响应;车辆速度提升会显著增大轨道结构振动,不同速度下轨道结构振动传递规律基本一致;速度提升会显著增大轮轨动力作用,引起车辆动力学性能恶化,但CRTSIII型板式无砟轨道具备350 km/h运营能力.Taking CRTSIII plate type ballastless track of a high speed railway test section as the background,based on the theory of vehicle track coupling,a subgrade section vehicle track dynamics model is established,the vibration of key parts and track model of dynamic response of the system is considered,the high speed vehicles track structure under the action of vibration transfer law is revealed,consequently the vehicle dynamic performance analysis of flexible track structure is analyzed.The results show that the dynamic response of high speed vehicle track system can be reflected more accurately by introducing flexible track and fully considering the elastic deformation of the structure under the rail.The vibration of the track structure will be significantly increased when the vehicle speed is promoted,and the vibration transmission law of the track structure is basically consistent under different speeds.However,CRTSIII plate type ballastless track has the operational capacity of 350 km/h.

关 键 词：高速铁路 CRTSIII型板式无砟轨道 车辆轨道耦合动力学 柔性轨道 动力响应 

分 类 号：U211[交通运输工程—道路与铁道工程]