摘要
通过现场测试,对提速列车引发的铁路线附近地面振动的时域特性、频域特性、传播规律及其影响因素进行了研究,并利用有限元软件ANSYS建立了大地振动三维有限元模型对提速列车引发的地面振动进行了数值分析。结果表明,列车引发的地面振动属于低频振动,地面对高频振动具有衰减作用;地面振动随距轨道中心线距离的增大呈递减分布,并且与车速和机车牵引类型有关,地面的竖向振动大于横向振动;地面振动随列车速度的提高而增大,随列车轴重的增加而增大。
Study of ground vibration near railroad tracks induced by speed-raised trains using the following factors： time, frequency, wave propagation laws and others. Application of finite element software, ANSYS coupled with the train-ground dynamic model is developed to predict the ground vibration induced by speed-raised trains. The results demonstrate the ground vibrations by the train are caused by low frequency. The high frequency attenuation decreased by land; The levels of ground vibrations are affected by the moving speed, the traction type, and decrease as the distance from the track centerline increased. The vertical vibrations are greater than the horizontal ones. Increased speed and heavier loads of trains induce larger ground vibrations.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第9期17-22,共6页
Environmental Pollution & Control
基金
国家"973计划"资助项目(No.2007CB4166-07)
国家自然科学基金资助项目(No.50568002)
江西省研究生创新基金资助项目(No.YC07C001)
关键词
列车
地面振动
现场测试
数值分析
trains
environmental vibration
field experiment
numerical analysis
