普通轨与槽型轨对现代有轨电车小半径曲线通过能力的影响

为研究不同类型钢轨上有轨电车的小半径曲线通过能力,基于多体动力学理论,建立了四模块低地板现代有轨电车仿真模型。在模型中考虑CHN60钢轨与60R2槽型轨的影响,并依据规范设置了3条小半径曲线线路,最后以车辆脱轨系数和轮重减载率为评价指标,对有轨电车小半径曲线通过能力进行评价分析。结果表明:两种钢轨上的有轨电车非线性临界速度均能满足车辆运行要求,且运行在CHN60轨上的车辆具有更好的非线性运动稳定性;在小半径曲线线路上运行时,60R2槽型轨上的车辆具有更好的稳定性,且槽型轨断面具有一定的护轨功能,因而在有轨电车钢轨选型上,建议使用槽型钢轨。

Influence of General Rail and Grooved Rail on Small Ra-dius Curve Passing Capacity of Modern Tram

In order to study the small radius curve passing ca-pacity of modern tram on different types of rails,based on multi-body dynamics theory,a simulation model of modern tram with four modules is established. In which the influence of CHN60 rail and 60R2 groove rail is considered and 3 kinds of small radius curve are set up according to subway code. On this basis,the vehicle derailment coefficient and wheel load re-duction ratio are taken as the evaluation indexes to evaluate the small radius curve passing capacity of modern tram on dif-ferent types of rails. The results show that the vehicle nonlin-ear critical speed on two types of rail can meet the require-ments of vehicle operation,and vehicles running on CHN60 rail have better nonlinear motion stability;while running on 60R2 grooved rail with small curve radius, the stability is bet-ter than running on CHN60 rail. Since the groove rail section has certain protection functions for the rail,it is recommended for rail type selection.