For a high-speed rail vehicle with gauge-changeable wheelsets, wheel/rail interactions and vehicle dynamics were numerically and experimentally studied within 600 km/h. Matching among four treads, three rail profiles, two gauges, and two rail cants are analysed by examining the wheelset conicity, contact points distribution, and stress. It shows that the conicities of the S1002 and LMA become smaller than the permitted minimum when rail cant 1/20 is used instead of 1/40 when matching with any of the three rail profiles. The conicity of S1002 decreases by up to 95% while that of LMA drops by about 30%. Whereas the RUS and LMB10 are compatible with two cants. Worn treads are more sensitive to the rail cant than new ones. Wheelback distance error leads to a conicity change, especially for worn profiles. A multi-body vehicle system dynamics analysis indicates that a 0.6 mm wheel-axle clearance leads to running instability at low speeds, but will not have an obvious effect on running safety and ride comfort. The vehicle dynamics behaviour on the standard- and broad-gauge tracks shows a slight difference. This has been validated through lab tests performed on a full-scale roller rig.

对于具有变轨距轮对的高速铁路车辆，在 600 km/h 内对轮轨相互作用和车辆动力学进行了数值和实验研究。通过检查轮对锥度、接触点分布和应力，分析了四个胎面、三个钢轨轮廓、两个轨距和两个钢轨斜面之间的匹配。它表明，当与三种钢轨轮廓中的任何一种匹配时，当使用钢轨斜面 1/20 而不是 1/40 时，S1002 和 LMA 的锥度变得小于允许的最小值。S1002 的锥度下降高达 95%，而 LMA 的锥度下降约 30%。而 RUS 和 LMB10 与两个斜面兼容。磨损的胎面比新的胎面对钢轨倾斜更敏感。轮回距离误差会导致锥度变化，特别是对于磨损的轮廓。多体车辆系统动力学分析表明，0.6 mm的轮轴间隙会导致低速行驶不稳定，但不会对行驶安全性和乘坐舒适性产生明显影响。标准轨距和宽轨距轨道上的车辆动力学行为略有不同。这已通过在全尺寸滚轮钻机上进行的实验室测试得到验证。