基于磨耗定量的地铁曲线钢轨波磨发展机理研究

Research on formation mechanism of metro curved rail corrugation based on wear quantification

对地铁小半径曲线上波浪形磨耗的形成发展机理进行了研究,基于粘滑振动是地铁小半径曲线波磨形成的原因,分析了波磨形成之后的发展机理,提出初始波磨的高点与低点处的磨耗量差异是波磨不断加深发展的原因。为此建立了一个波磨计算模型来基于磨耗定量验证。基于轮轨动力学及轮轨滚动接触分析,结合Archard材料磨损理论建立了钢轨磨耗量的计算模型,并利用Matlab/Simulink建立了相关模型。结果显示,波磨发展过程中,由于粘滑振动的影响,在初始波磨的凸起处磨耗量小,低凹处磨耗量大,使得波磨呈现出波长固定而波深不断增加的钢轨型面特征。

The formation and development mechanism of the rail corrugation on the sharp curve of subway are studied based on the stick-slip vibration.The fixed wavelength mechanism of corrugation is analyzed,and the high and low points of initial corrugation is proposed.The difference in the amount of wear at the point is the reason why the corrugation is developing.To this end,a wear calculation model is established to quantify.Based on the vehicle-rail coupling dynamics and wheel-rail rolling contact analysis,and Archard material wear theory,a calculation model of rail wear is established with Matlab/Simulink.The results show that during the development of corrugation,due to the influence of stick-slip vibration,abrasion loss at the initial corrugation ridge is smaller than that at the low-recess,which makes the corrugation with a fixed wavelength and increasing wave depth.