路基不均匀沉降对车辆-CRTSⅢ型轨道系统动力特性影响  

Influence of subgrade uneven settlement on dynamic characteristic of vehicle-CRTSⅢ slab track system

作　　者：唐进锋[1] 刘文峰 王浩 秦志 TANG Jinfeng;LIU Wenfeng;WANG Hao;QIN Zhi(School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2018年第10期2455-2462,共8页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51578552)

摘　　要：为研究路基不均匀沉降对车辆—CRTSⅢ型板式轨道系统动力特性的影响,以多体动力学和有限元方法分别计算车辆和轨道系统的动力响应,2个子系统通过轮轨关系实现耦合。建立考虑重力作用的车辆—CRTSⅢ型板式轨道空间耦合动力分析模型,利用该模型研究不同行车速度、路基不均匀沉降幅值和波长对系统动力响应的影响。研究结果表明:系统动力响应随行车速度和路基不均匀沉降幅值增加而相应增加,影响行车的路基不均匀沉降幅值限值应由舒适度指标控制,数值应控制在20 mm/20 m以下;系统的动力响应随路基不均匀沉降波长的增加呈先增大后减小的趋势,制定路基不均匀沉降标准时,应将沉降波长与幅值进行综合考虑。In order to study the dynamic influence of subgrade uneven settlement on vehicle-CRTSⅢslab track system,the response of vehicle and slab track system is calculated with multi-body dynamics and FEM respectively,and the two subsystems are coupled with wheel-rail relationship.A vehicle-CRTSⅢslab track 3-D coupled dynamic model that the gravity is considered was established later.Then,the factors that affect the dynamic respond including speed,magnitude and wavelength of the settlement were researched.Results indicate that the response increases with the increasing of speed and the magnitude of subgrade uneven settlement,the limit value of the uneven settlement magnitude affecting driving is controlled by the comfort index,and it should be controlled less than 20 mm/20 m.The dynamic response increases first and then decreases with the increasing of the uneven settlement wavelength.The magnitude and wavelength of the uneven settlement should be considered together when setting the standard for the subgrade uneven settlement.

关 键 词：CRTSIII板式轨道 路基不均匀沉降 联合仿真 动力响应 

分 类 号：U211.5[交通运输工程—道路与铁道工程] U213