国外有轨电车小半径曲线轮轨动力学及减磨优化分析

Analysis on small radius curve wheel-rail dynamics and anti-friction optimization of trams abroad

结合埃塞俄比亚有轨电车项目,基于低地板有轨电车结构特性和轮轨关系建立对应的非线性嵌入式轨道车线耦合动力学模型,计算不同曲线半径、轮轨摩擦系数、车辆轮重、车辆通过速度等参数对钢轨磨耗的影响规律。结果表明:车辆通过总重和通过速度与轮轨动态响应及磨耗呈正相关,随着通过总重和速度的增大,轮轨磨耗显著增加;随着摩擦系数增大,横向力减小但磨耗增大;适当增大曲线半径能够有效改善轮轨接触状态,优化列车通过曲线的性能。

Combined with the Ethiopian tram project,based on the structural characteristics of low-floor trams and its wheel-rail interaction,a nonlinear embedded vehicle-track coupling dynamics model was established,and the influence of different parameters such as curve radius,wheel/rail friction coefficient,vehicle wheel weight and vehicle speed on rail wear were calculated.The results show that the total vehicle passing weight and speed are positively correlated with the dynamic response and wear of the wheel/rail.With the increase of the total vehicle passing weight and speed,the wear of the wheel/rail increases significantly.With the increase of the friction coefficient,the lateral force decreases but the wear increases.Appropriately increasing the curve radius can effectively improve the wheel-rail contact state and optimize the performance of the train through the curve.