摘要
建立了轮对和钢轨之间弹性联接３３个自由度的机车车辆动力学模型，采用有限元法分析计算了列车荷载作用下某铁路双线钢桁桥（跨度６４ｍ）的动力响应。采用空间梁单元建立了桁架桥的振动方程。根据随机振动理论计算了当列车过桥时，车－桥耦合振动系统的空间动力响应，并与实测结果进行了比较。比较表明，采用弹性联接模型比密贴模型的计算结果更接近于实测值。
A new locomotive model is proposed to study the dynamic interactions between a moving locomotive and a railway truss bridge. In this model, the wheels and tracks are connected by springs and with 33 degree of freedom. A double track steel truss railway bridge with a span of 64 m is taken as an example. FEM is employed to calculate the dynamic responses of the bridge to a moving locomotive. Vibration equations for the truss bridge are also derived by using a space beam element. The dynamic responses of the bridge to the moving locomotive are calculated based on random vibration theory. The comparison of the calculated results with those from another model and from the vibration measurements is satisfactory.
出处
《西南交通大学学报》
EI
CSCD
北大核心
1998年第2期138-142,共5页
Journal of Southwest Jiaotong University
关键词
有限元法
振动理论
机车
桁架桥
车桥耦合振动
finite element methods
theory of vibration
dynamics model of the locomotive
truss bridge
vehicle/bridge interaction vibration
dynamic response
