In order to improve the passing performance of the diverging route of a turnout, a tentative idea of applying a superelevation transition on the guide curve is proposed. Based on the parameters of 1:42 turnout, the guide curve is modified with different combinations of horizontal alignment and superelevation. Superelevation is implemented by the way of decreasing the elevation of the inner rail. A multi-body dynamics model is devised to calculate the wheel-rail force, derailment coefficient and lateral stability coefficient under different velocities and curve conditions. By comparing the simulation results, it is concluded that the modification of guide curve, especially the application of superelevation, can optimise safety indices apparently.

为了提高道岔分岔路线的通过性能，提出了在引导曲线上应用超高过渡的设想。根据道岔1:42的参数，采用水平线形和超高的不同组合对导向曲线进行修正。超高是通过降低内轨标高的方式实现的。设计了多体动力学模型来计算不同速度和弯道条件下的轮轨力、脱轨系数和横向稳定性系数。通过对比仿真结果得出结论，引导曲线的修改，特别是超高的应用，可以明显优化安全指标。