Effect of the Wheel/Rail Contact Geometry on the Stability of Railway Vehicle

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Xing, Lu Lu^1 ; Wang, Yue Ming^1 ; Dong, Xiao Qing^1

China Academy of Railway Sciences, Beijing

100081, China^1

关键词: Equivalent conicity;    High speed vehicles;    Non-linear stabilities;    Nonlinear characteristics;    Subcritical Hopf bifurcation;    Supercritical Hopf bifurcation;    Wheel/rail contact;    Wheel/rail interaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/6/062134/pdf
DOI  :  10.1088/1757-899X/392/6/062134

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Regarding the hunting instability issue occurred on the high-speed vehicle, a CRH2C vehicle model is built for investigating the stability based on the wheel/rail interaction analysis. It is found that the Hopf bifurcation type is dependent on the equivalent conicity slope in the neighborhood of 3mm wheelset displacement. A decreasing equivalent conicity leads to a supercritical Hopf bifurcation, while an increasing one leads to a subcritical Hopf bifurcation. Furthermore, a wide wear band on the rail head can raise the equivalent conicity, which in turn decreases the nonlinear critical speed. It is concluded that the more concave of the equivalent conicity curve, the more nonlinear characteristics can be noticed on the wheel/rail interaction which leads to a severe performance on the nonlinear stability.