Simulation and Analysis for Stick-Slip Vibration of Locomotive with Hollow-Shaft Drive System

For the purpose of investigating the stick-slip vibration of the locomotive with a hollow-shaft drive system, a coupled dynamic model of locomotive and slab track is established based on the theory of the vehicle-track coupled dynamics. The dynamic equations are set up considering the nonlinear relationship between slip velocity and the adhesion coefficient. A simulation program is then compiled using MATLAB/SIMULINK. Simulation results show that the phase trajectories of the torsional vibrations are a set of stable limit cycles when the slip velocity is located at the descending slope of the adhesion coefficient curve, indicating that self-excited torsional vibrations are occurred in the drive system.