车轮阻尼及接触点位置对轮轨接触过程稳定性的影响  

Influence of wheel damping and contact position on the stability of wheel-rail contact system

作　　者：王振[1] 陈照波[1] 焦映厚[1] 黄文虎[2] 

机构地区：[1]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《振动工程学报》2012年第6期619-627,共9页Journal of Vibration Engineering

基　　金：科技部科技人员服务企业行动项目资助(2009GJB20012);铁道部科技研究开发计划项目(2011G008)

摘　　要：结合S形辐板辗钢整体车轮和60 kg/m钢轨的尺寸与性能要求,利用有限元法和模态试验法建立车轮高频振动模型,并在考虑钢轨断面变形和轨下结构影响的基础上建立钢轨高频振动模型。在改变轮轨接触点位置和车轮模态阻尼比的情况下对轮轨接触系统进行了稳定性分析。结果表明:节圆数为0的车轮模态对系统稳定性的影响最明显;增大横向蠕滑量会使轮轨接触系统容易发生不稳定,并且该蠕滑量在轮缘接触时的影响比在踏面时要大;接触点位置对接触系统稳定性的影响与轮轨偏向角及接触面摩擦系数的大小有关;增大车轮阻尼能明显减少接触系统不稳定频率的个数,并且在偏向角较大时,阻尼的作用对轮缘接触更明显。The wheel dynamic model at high frequency was established according to FEM and modal test based on the performances and dimension parameters for the monobloc steel wheel with S-web and the 60 kg/m rail. The cross section deformation of the rail and the effect of its understructure were also considered. The stability of wheel-rail contact system was analyzed in the case of different contact positions and modal damping ratio of the wheel. It is shown tlhat the wheel mode with zero nodal circle has the most obvious effect on the stability of contact system. The increment of lateral creepage can lead the contact system to become unstable, and the effect of creepage is more obvious in flange contact than tread one. The effect of contact position depends on the yaw angle of the rail and the friction coefficient in contact area. The increment of wheel damping can decrease the number of unstable frequency, and the effect of damping is more obvious in flange contact under large yaw angle.

关 键 词：轮轨接触 自激振动 蠕滑量 模态叠加 稳定性 

分 类 号：TB533.2[理学—物理]