轮对辐板开孔对钢轨波磨的影响

基于轮轨间蠕滑力饱和引起轮轨系统摩擦自激振动从而导致钢轨波磨的理论,研究轮对辐板开孔对地铁小半径曲线钢轨波磨的影响,利用ABAQUS仿真软件分别建立无孔和开孔的轮对与钢轨、轨枕组成的有限元模型,采用复特征值方法研究辐板开孔距离、开孔大小和开孔个数对钢轨波磨的影响。结果表明:小半径曲线工况下饱和蠕滑力会导致钢轨波磨;辐板开孔距离对钢轨波磨的发生概率是有影响的,较小的开孔距离可以得到相对良好的稳定性;辐板开孔大小对钢轨波磨的发生概率影响较小;相比较无孔辐板和其他开孔个数辐板,辐板开4孔稳定性最好,可降低钢轨波磨的发生概率。

Influence of Wheel Web Hole on Rail Corrugation

In order to study the influence of web holes on rail corrugation on sharp curved tracks,a finite element model was established from the viewpoint of friction induced vibration causing rail corrugation,which consists of wheels with web holes or not,rails and a serial of sleepers.The model was analyzed by using the complex eigenvalue method,and the influences of the distance of holes,the number of holes and the size of holes on rail corrugation were studied.The simulation results show that the saturated creep force may lead to rail corrugation on a sharp curved track.The distance of web hole has some influence on the occurring propensity of rail corrugation.The wheel with web holes of short distance has good stability.The size of web hole has a little influence on the occurring propensity of rail corrugation.The wheel with four holes can reduce the occurring propensity of rail corrugation compared to others,which has good stability.