中文摘要：

基于惯性力与轮对蛇行频率及波长间的关系,研究轨距对机车车辆稳定性的影响,并通过对各种轨距下单轮对走行部和转向架式走行部的特征值计算,验证分析结果。结果表明：对于单轮对走行部,轨距越宽,车辆稳定性临界速度越高;对于转向架式走行部,轨距越宽,机车车辆稳定性临界速度越低;采用弹性定位后,可以提高单轮对走行部的稳定性临界速度;转向架采用弹性定位之后,优化的悬挂设计可以使机车车辆达到很高的稳定性临界速度;对于转向架式走行部,速度对稳定性的影响程度与轴距的影响程度相当,在其他条件不变的情况下,轴距增大20%,相当于其稳定性临界速度可提高20%;车轮踏面等效锥度和名义滚动圆半径对单轮对或转向架式走行部稳定性临界速度的影响与轨距的影响程度相同,锥度加大或轮径减小,均会降低机车车辆的稳定性。

英文摘要：

Based on the relationship between the inertia force and the hunting frequency wavelength of the wheelset, the influence of the track gauge on the vehicle yaw stability was studied. The analysis results were validated through the numerical calculations of the eigenvalue for single wheelset running gear and the bogie running gear under different track gauge. Results show that for single wheelset running gear, the wider is the track gauge the higher is the critical stability speed of the vehicle. But for the bogie running gear, the wider is the track gauge the lower is the critical stability speed of the vehicle. The critical stability speed of the single wheelset running gear can be improved after the elastic location being adopted. The optimized suspension design can make the rolling stock achieve high critical stability speed after the elastic location being adopted for the bogie. For the bogie running gear, the impact of the speed on its stability is equivalent with that of the wheel base. Under otherwise fixed conditions, 20% increase of the wheel base can lead to 20% increase of its critical stability speed. The equivalent conicity of the wheel tread and the nominal rolling circle diameter have the same impact with the track gauge on the critical stability speed of the single wheelset or bogie running gear. To increase the conicity or decrease the wheel diameter, both can reduce the stability of the rolling stock.