驱动工况单轮对横向稳定性  

Lateral Stability of Single Wheelset under Traction

作　　者：姚远[1] 张红军[1] 罗赟[1] 金鼎昌[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《西南交通大学学报》2011年第5期826-830,共5页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(51075339)

摘　　要：为了解驱动工况下轮对横向稳定性,建立了考虑驱动力矩的简化单轮对动力学模型,针对不同轮轨的黏着特性,研究了弹性定位单轮的横向蛇行稳定性.结果表明:驱动工况下,轮对横向稳定性优于惰行工况,对于弹性定位动力单轮对,当平均蠕滑率为0.8%时,横向非线性临界速度为惰行时的1.1倍;驱动时,轮轨黏着饱和导致轮对摇头力矩减小,有利于横向稳定性,但纵向切向力增加使得横向切向力减小,对轮对横向稳定性不利.A simplified dynamic model of single wheelset under traction was established to study its lateral stability.The hunting stability was analyzed on different adhesion conditions between wheel and rail.The results show that a single wheelset has a better lateral stability under traction than under idle running,and that when the average creep is 0.8% the nonlinear critical speed of an elastically positioned single wheelset under traction is 1.1 times of that under idle running.Wheel/rail adhesion saturation results in a decrease in wheelset yaw torque,and a decrease in driving torque causes an increase in lateral creep force,both of which are in favor of wheelset stability.

关 键 词：横向稳定性 驱动 轮对 轮轨黏着饱和 

分 类 号：U260.11[机械工程—车辆工程]