中文摘要：

在广大山区，由于受到条件的限制，线路往往依山势而建，条件差，半径小，高差大，对机车本身性能要求较高。针对某型专门适用于山区线路设计的380米轨机车，建立车辆动力学模型，对比原始转向架和加装了横动装置的改进型转向架，对机车动力学性能进行分析。结果表明：在直线运行工况下轮轴横向力与脱轨系数最大值出现在中间转向架第三轮对，与原始方案相比。改进方案机车惰行工况下脱轨系数和轮轴横向力都较大；在R60的小半径曲线工况下，二系橡胶堆无法提供足够的横向剪切变形，而通过加装横动装置能够补偿车体与构架间巨大的横向偏移与扭转变形，大大减小轮勒横向冲击。

英文摘要：

In mountainous areas, due to natural conditions, the liners are at the condition of low standard. The curve radius is small and the slope is large. Therefore, a higher performance requirements are put forward to the locomotives.Establish a dynamics model of a certain type of 3B0 locomotive being adapted to mountainous meter gauge line. Compare the original bogie to the modified one with traversing unit and analysis the locomotive dynamic performance. The results show： on tangent track, derailment coefficient and axle lateral forces of the third wheelset are larger than the other ones. Compared to original bogie, derailment coefficient and axle lateral forces of the modified one are larger. In R60 small radius curve condition, the secondary rubber heap couldn＇t provide enough transverse shear to compensate the large lateral displacement and torsion deformation between carbody and frame. With the help of traversing unit, the wheel/rail lateral impact could greatly decline.