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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第1期    总第45期    2012年2月

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文章编号:1672-7029(2012)01-0122-03
移动质量速度对钢轨动力响应的影响
黄志辉1,2,陈庆广1,2,李屹罡1,2,施亮林1,2

(1.中南大学机电工程学院,湖南长沙410083;
2.中南大学高性能复杂制造国家重点实验室,湖南长沙410083
)

摘 要: 为了研究移动质量速度与受载钢轨变形之间的关系,针对现有轮轨系统监测实验台物理模型,建立弹性点支撑的轮轨系统力学模型; 结合钢轨的边界条件和荷载类型,采用振型叠加法对钢轨力学模型的振动方程求解,用MATLAB 对移动质量从10 ~ 70 km/h 不同速度下的钢轨动力响应进行分析,初步得出钢轨随移动荷载速度的变形规律: 钢轨的变形随着移动质量速度的增大而减小,并通过实验对仿真规律进行了验证。

 

关键字: 钢轨; 速度; 扫掠力; 振型叠加法; 动力响应

The effect of moving mass velocity on the dynamic response of the rail
HUANG Zhi-hui1,2,CHEN Qing-guang1,2,LI Yi-gang1,2,SHI Liang-lin1,2

1.School of Mechanical and Electrical Engineering,Center South University,Changsha 410083,China;
2.State Key Laboratory of High Performance Complex Manufacturing,Changsha 410083,China

Abstract:In order to study the relation between the speed of moving mass and the deformation of loading rail,an elastic support mechanical model about wheel-rail system was built,on the basis of the physical model of existing wheel-rail monitoring equipment.Combined with the boundary conditions and load type,the oscillation equation of rail mechanical model was solved via vibration superposition method.The dynamic response of rail mass under different moving velocity range from 10 km/h to 70 km/h has been analyzed by MATLAB.The law of the relation between rail deformation and the speed of moving mass was preliminary got.That is the deformation of rail decrease when the speed of the moving mass increased.And the regular pattern obtained from the simulation was verified by experiment.

 

Key words: rail; velocity; wheel-scan force; vibration superposition method; dynamic response

ISSN 1672-7029
CN 43-1423/U

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