本文指出了铁路车辆的横向稳定性与曲线通过性能是密切相关联的,用普通转向架要达到较高的运行速度,几乎不可避免要降低曲线通过性能,径向转向架减少了车辆稳定性与曲线通过性能间的矛盾,并着重分析了自导向及迫导向径向转向架的原理及性能。 This paper points out that the lateral stability of railway vehicles is closely related to the curve passing performance. It is almost inevitable to reduce the curve passing performance by using an ordinary bogie to achieve high running speed. The radial bogie reduces the vehicle stability and The conflict between the performance curves and the principle and performance of self-steering and forced-steering bogie are analyzed emphatically.