摘要
建立了完整的非线性动力学仿真计算模型,分别使用初始激励法和实测随机不平顺激励法两种非线性稳定性计算方法对等效锥度曲线呈平坦和呈凹形的两类轮轨匹配进行非线性稳定性计算,并对计算结果进行对比。结果发现:等效锥度曲线平坦变化的轮轨匹配形成亚临界Hopf分岔图,并且两种非线性稳定性计算方法所求临界速度基本一致;"凹"形等效锥度形成超临界Hopf分岔图,速度很小时就出现了幅值较小的极限环运动,两种非线性稳定性计算方法所求临界速度相差非常大。
This paper analyzed the wheel/rail contact geometric characteristics of plain and concave equivalent conicity curve.Using the non-linear methods of single excitation and stochastic excitation assessed the stability of vehicles based on completed and non-linear vehicle model,and the two results were compared.It was show that： the wheel/rail contact of plain equivalent conicity curve leaded to subcritical Hopf bifurcation and the results using two methods were almost equal.The wheel/rail contact of concave equivalent conicity curve leaded to supercritical Hopf bifurcation and constant amplitude periodic-oscillation when the velocity was very low,and the results using two methods had a great difference.
出处
《铁道机车车辆》
北大核心
2011年第4期49-52,共4页
Railway Locomotive & Car
关键词
临界速度
失稳
等效锥度
轮轨接触几何
critical speed
instability
equivalent conicity
wheel/rail contact geomery
