Simulation of Dynamic Interaction between the Railway Bogie and the Track in the Medium Frequency Range

In the present paper, the dynamicinteraction between a bogie of a modern railwaypassenger car and a track is considered with the helpof a discrete-continuous mechanical model. This modelenables us to investigate the bending-torsional-axialvibrations of the wheelsets coupled with the verticaland lateral vibrations of the track through thewheel-rail contact forces. The numerical results areobtained in the form of frequency response functionsfor the linearized bogie-track system as well as bymeans of computer simulation of forced vibrationsperformed for the non-linear system. Particularlysevere interaction between the bogie and the track iscaused by kinematic and parametric excitation from thetrack and by kinematic excitation due to wheel treadpolygonalization.