中文摘要：

研究了三轴机车径向导向机构工作原理，采用数值仿真的方法分析了机车径向转向架和常规转向架通过缓和曲线时轮轨接触特性。研究结果表明：径向机构能够均衡前后轮对的导向力矩，改善机车一系悬挂的受力，有利于转向架构架向曲线径向方向摇头；常规转向架导向轮对易发生轮缘贴靠，产生较大冲角，而径向转向架轮对能够在较大半径下维持较小的冲角，导向轮对发生轮缘贴靠以后会削弱径向转向架的导向性能；两种转向架轮对的蠕滑力分布规律一致，导向轮对横向蠕滑力大于纵向蠕滑力，第3轮对纵向蠕滑力大于横向蠕滑力；横向蠕滑力的变化过程表现出强的非线性规律，较小的冲角就会产生较大的横向蠕滑力。

英文摘要：

The working principle of radial steering structure for three axle locomotive was studied. Wheel-rail contact features of locomotives with radial bogie and conventional bogie during passing transition curve were analyzed in detail by using the numerical simulation method. It is concluded that radial structure can balance the steering torques between wheelsets and improve locomotive primary suspension force to promote the bogie frame moving along the radial direction. The guide wheelset of conventional bogie is more susceptible to flange contact, which leads to a greater angle of attack. The guide wheelset in the radial bogie can maintain a smaller angle of attack on a large radius curve. When the flange contact occurs on the guide wheelset, the steering ability of radial bogie is weakened. The creep force distributions are almost same for the two types of bogies, i.e. the lateral creep force is greater than the longitudinal creep force for the guide wheelset, but the longitudinal creep force is greater than the lateral creep force for the third wheelset. The change of lateral creep force shows strongly nonlinear characteristic that smaller angle can cause larger lateral creep force. 13 figs, 14 refs.