CRTSⅢ型板式无砟轨道减振过渡段动力特性分析  

Study on the Settings of Transition Section for CRTSⅢSlab Ballastless Track

作　　者：张世杰[1,2] Zhang Shijie(China Railway Siyuan Survey and Design Group,Wuhan 430063,China;Key Laboratory of Railway Service Safety of Hubei Province,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]铁路轨道安全服役湖北省重点实验室,湖北武汉430063

出　　处：《华东交通大学学报》2021年第1期8-16,共9页Journal of East China Jiaotong University

基　　金：中国铁路总公司科技研究开放计划项目(J2015C006)。

摘　　要：针对高速铁路CRTSⅢ型板式无砟轨道减振地段与非减振地段的刚度过渡段进行研究,基于车辆-轨道耦合动力仿真分析,在各级过渡段减振垫刚度按双倍递减的情况下,讨论过渡段范围每一级过渡长度和过渡级数对轮轨动力响应的影响。研究结果表明:当过渡级数一定,每一级过渡长度采用3块轨道板长度(约15 m),轮轨力幅值、过渡段与减振地段交界面板缝两侧扣件下压力差值、车体垂横向加速度幅值、脱轨系数及轮轨减载率均最小,且钢轨挠曲变化率、列车运行品质和稳定性满足相关限值要求;当每一级过渡长度一定时,过渡级数采用3级,轮对垂向位移突变值、轮轨力幅值、钢轨挠曲变化率幅值、板缝两侧扣件下压力、过渡段与非减振地段交界面板缝两侧的错台量和扣件下压力差值均最小,且钢轨挠曲变化率、列车运行品质和稳定性满足相关限值要求;过渡段范围内,列车在经过轨道板缝时存在较大的轮轨冲击作用,尤其在各级过渡段的交界面,轮轨冲击作用更加显著,建议加强对板缝、各级过渡段交界面附近扣件系统的养护和核查。The stiffness transition section of high-speed railway CRTSⅢslab ballastless track in vibration damping section and non vibration damping section is studiedin this paper.Based on the vehicle track coupling dynamic simulation analysis,the influence of each transition length and transition stage on the dynamic response of wheel rail is discussed under the condition that the stiffness of damping pad in each transition section decreases by double.The research results show that:when the transition stage is determined,the length of three track plates(about 15 m)is used for each transition stage,the wheel rail force amplitude,the difference of the downward pressure of fasteners on both sides of the panel seam at the junction of the transition section and the vibration damping section,the vertical and lateral acceleration amplitude of the car body,the derailment coefficient and the wheel rail load reduction rate are the minimum,and the rail deflection rate,the train running quality and stability meet the relevant limit requirements;When the transition length of each stage is determined,the transition stages are three,the sudden change value of vertical displacement of wheelset,the amplitude of wheel rail force,the amplitude of rail deflection rate,the downward pressure of fasteners on both sides of slab gap,the staggering amount on both sides of slab gap at the junction of transition section and non damping section and the difference of downward pressure of fasteners are the minimum,and the rail deflection rate,train running quality and stability meet the requirements of relevant limit values within the scope of the transition section,the train has a larger wheel rail impact when passing through the rail joint,especially at the interface of the transition sections at all levels.The wheel rail impact is more significant.It is recommended to strengthen the maintenance of the fastening system near the interface of the plate and the transition sections.

关 键 词：CRTSⅢ型板 减振 无砟轨道 过渡段 

分 类 号：U213.5[交通运输工程—道路与铁道工程]