高速列车作用下不同类型无砟轨道振动响应分析  

Investigation on Dynamic Responses of Different Type Ballastless Tracks under High-speed Train

作　　者：向俊[1] 赫丹[1] 曾京[2] 

机构地区：[1]中南大学土木建筑学院,长沙410075 [2]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《机械工程学报》2010年第16期29-35,共7页Journal of Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划;2007CB714706);国家自然科学基金(50678176;50908232);新世纪优秀人才支持计划(NCET-07-0866);牵引动力国家重点实验室开放课题(TPL0901)资助项目

摘　　要：基于不同类型无砟轨道空间振动分析模型,利用高速列车—无砟轨道系统空间振动分析理论,分别计算板式轨道、双块式轨道及博格板式轨道在高速列车作用下的空间振动响应,分析比较系统振动响应随无砟轨道类型及车速的变化规律。结果表明:系统振动响应均随车速的提高而增大;在车速相同的条件下,无砟轨道类型对钢轨竖向位移、轨道板竖向位移、轨道板竖向加速度、轮轨竖向力、脱轨系数及轮重减载率等响应影响较大,对其他振动响应的影响不甚明显;相对而言,博格板式轨道动力特性最好,其次为双块式轨道,板式轨道的动力特性最差。The spatial vibration responses of slab track and twin-block track and bgl slab track under high-speed train are calculated on the basis of the spatial vibration models of different type ballastless tracks and the analysis theory of spatial vibration of high-speed train and ballastless track system,respectively.The effect of different type ballastless tracks and speed on the dynamic responses of the system is analyzed and compared.It is shown that the effect of different type ballastless tracks on the vertical rail displacement,vertical slab displacement,vertical slab acceleration,vertical wheel-rail force,derailment factor and wheel load reduction factor,etc.is high,and the effect of different type ballastless tracks on other dynamic responses of the system is very low.Comparatively,the dynamic performance of bgl slab track is better than that of twin-block track,and the performance of slab track is the worst.

关 键 词：铁道工程 博格板式轨道 双块式轨道 板式轨道 高速列车 空间振动 

分 类 号：U213.242[交通运输工程—道路与铁道工程] TU311.3[建筑科学—结构工程]