驱动工况下重载机车与轨道动态相互作用

Dynamics Interaction between Heavy-Haul Locomotive and Track under Driving Conditions

为研究机车与弹性轨道的动态相互作用特征，针对具有轴悬式牵引电机的重载机车，考虑电机驱动装置和牵引力，建立了机车一轨道耦合动力学模型．采用Polaeh蠕滑力计算模型计算得到大滑动条件下，轮轨切向力和牵引力450kN时重载机车的粘着重量利用率；分析了牵引力在150～450kN区间变化时，机车通过曲线轨道时的轮轨动态相互作用．研究结果表明：牵引力为450kN时，机车的粘着重量利用率达到了91．2％，增大机车牵引力，有利于改善导向轮对的轮轨横向动态相互作用，但轮轨磨耗程度有所加剧．

In order to investigate the characteristics of the dynamic interaction between locomotive and elastic track, a locomotive-track coupled dynamics model for the heavy-haul locomotive driven by axle hung traction motor was built, taking the electric motor drive system and traction into account. Then, the wheel/rail contact tangential force under large slip conditions and the adhesion utilization rate for the heavy-haul locomotive with a traction of 450 kN were calculated using the Polach nonlinear creep force model. As the traction varied between 150 and 450 kN, the wheel/rail dynamic interaction of the locomotive passing through a curved track was analyzed. The results show that the utilization factor of adhesive weight reaches 91.2% when the traction is 450 kN; and an increase in traction is favorable to improve the lateral wheel/rail dynamic interaction, but will worsen the wheel/rail wear.