车桥耦合中轮径差对车轮磨耗的影响
Influence of Wheel Diameter Difference on Wheel Wear in Process of Vehicle-bridge Coupling

推导了同时考虑接触斑内刚性滑动量和弹性变形量影响的轮轨相对滑动速度计算公式;建立了车轮磨耗理论计算模型并发展了相应的数值分析程序,该计算模型中包含了车桥耦合动力学模型、轮轨滚动接触模型和材料摩擦磨损模型。应用该模型仿真分析了4种典型轮径差对车桥耦合中车轮磨耗的影响。分析结果表明:轮径差不仅会造成车轮的严重偏磨,而且会明显改变车轮踏面的磨耗区域。
In this paper, the calculation algorithm of the wheel-rail relative sliding velocity taking both the rigid and elastic deformations in the contact patch into consideration was derived. A theoretical calculation models to predict the railway wheel wear and the numerical analysis program were developed, including the coupling dynamics model of vehicle and bridge, a wheel material wear model and the rolling contact model of wheel and rail system. The influence of four typical wheel diameter differences on wheel wear in the process of vehicle-bridge coupling is analyzed with the models. The results indicate that wheel diameter difference not only results in the wheel eccentric wear, but also causes the changes of the wear region of wheel tread