高速铁路有阻尼轨枕失效对钢轨沉降的影响  

Impact of High-speed Railway Damped Sleeper Failure on Rail Settlement

作　　者：朱爱华[1] 朱成九[1] 左德元[2] 

机构地区：[1]华东交通大学,南昌330013 [2]西南交通大学,成都610031

出　　处：《路基工程》2010年第3期6-8,共3页Subgrade Engineering

基　　金：铁路环境振动与噪声教育部工程研究中心开放研究项目

摘　　要：随着列车运行速度的不断提高,铁路线路的动态响应日益突出,而影响线路动态响应的重要因素之一是线路的基础弹性支撑。文中通过建立有阻尼、离散化基础弹性的线路动力学模型,推导出有限元公式,并利用VC编程计算。结果表明:低速、有阻尼、轨枕失效数较少(通常≤2根)时,轨枕失效对钢轨最大位移幅值的影响不明显,否则,其影响是显著的。Dynamic responses of railway lines are becoming increasingly conspicuous with the speeding up of trains.One of the crucial influential factors on railway dynamic response is the basic elastic support of railway lines.This paper deduces finite element formulas through establishing damped and discreted basic elastic mechanical model of railway lines,together with VC programming computation.The conclusion shows that with low speed,damping and lower number of defects（normally ≤2 radix）,sleeper failure has little impact on the maximum displacement amplitude of rails.Otherwise it has significant influence.

关 键 词：有阻尼 轨枕失效 钢轨沉降 

分 类 号：U213.31[交通运输工程—道路与铁道工程]