ABSTRACT
ABSTRACT: When the high-speed train is skidding, the wheel-rail adhesion force decreases with the creep velocity going up. That is a kind of self-excited vibration. This article proposes a dynamical model of the single frame driving system and the wheel-rail longitudinal coupling vibration when the high-speed train skids. By calculating the characteristic roots of the homogeneous equations that the model corresponds to, the effects of different rigidity and damping on the system characteristic roots are analyzed, thus providing a theoretical basis for parameter optimization. The theoretical analysis indicates that the parameters of the driving system should be appropriately set because of the inter-coupling between the torsional vibration from the driving system and the longitudinal vibration from the wheel set. Otherwise, the stability of the frame longitudinal movement will be affected.
