列车-有砟轨道-路基空间耦合动力学模型  

SPATIAL DYNAMIC MODEL OF TRAIN-BALLAST TRACK-SUBGRADE COUPLED SYSTEM

作　　者：徐鹏[1] 蔡成标[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《工程力学》2011年第3期191-197,共7页Engineering Mechanics

基　　金：国家科技支撑计划项目(2009BAG12A01-A03-1);国家973计划项目(2007CB714700);全国博士学位论文作者专项资金项目(2007B56);中央高校基本科研业务费专项资金项目(2010XS35)

摘　　要：建立了列车-有砟轨道-路基空间耦合动力学模型。模型中,充分考虑了机车车辆、有砟轨道、路基的空间特性、时变特性及相互作用,对路基系统,采用连续体建模的方法,并利用Galerkin法进行了离散。通过仿真计算与秦沈线综合试验实测结果进行比较,验证了模型的可靠性。以运行速度为200km/h的CRH2动车组作用为例分析了路基的动力特性,得出了基床表面变形、应力的动态响应结果,动变形、动应力沿路基纵向和横向的分布。该模型实现了列车-有砟轨道-路基耦合振动系统的快速计算,可用于研究列车、有砟轨道、路基之间的动力相互作用及对路基动力特性进行详细分析。A dynamic model of a train-ballast track-subgrade coupled system is established.In the model,spatial and time varying characteristics and interactions between the rolling stock,ballast track and subgrade are fully considered.The subgrade are modeled based on continuum theory and then be discretized by utilizing one of Galerkin methods.The model is reliable by comparing the calculation results with the test results in Qin-Shen passenger line.When the CRH2 EMUs passing at a speed of 200km/h,the dynamic characteristics of subgrade are studied and analyzed.The dynamic responses such as the deformation and stress of subgrade surface,the dynamic deformation and stress distribution along the longitudinal and lateral directions are obtained.Such a model performs a fast calculation for the train-ballast track-subgrade coupled system,which can be used to study dynamic interactions between a train,ballast track and subgrade and make a detailed analysis about the dynamic characteristics of subgrade.

关 键 词：列车 轨道 路基 耦合动力学 动力响应 

分 类 号：U270.1[机械工程—车辆工程] U213.1[交通运输工程—载运工具运用工程]