The General Speed Train/the Vertical Dynamic Characteristics Of Research On Bi-block Ballastless Track

The general speed locomotive vehicle/the general speed passenger vehicle/motor train-the vertical dynamics model of Bi-block ballastless track is established in this paper. Bed slab and support layer use the continuous structures. The dynamic influence on Bi-block ballastless track by the general speed locomotive vehicle is bigger than the general speed passenger vehicle. Therefore, this paper will only do the main analysis of the surface depression weld irregularity on rail, the salient surface weld irregularity on rail and the track torsion irregularity on the effect of on the Bi-block ballastless track under the action of general speed locomotive vehicle and Motor train.Weld irregularity on rail have a large effect on rail acceleration rail displacement bed slab acceleration, support layer acceleration、vertical wheel-rail force, maximum pressure on backing plate under rail, and have a small effect on bed slab displacement and support layer displacement.With the action of Weld irregularity on rail, wherever the weld position is, the wheel unloading rate caused by motor train is bigger than the general speed locomotive vehicle, the rail’s maximum displacement, bed slab’s maximum displacement, support layer’s maximum displacement, vertical wheel-rail force and maximum pressure on backing plate under rail caused by the general speed locomotive vehicle is bigger than those caused by motor train.With the action of the track torsion irregularity, except the support layer’s maximum acceleration, the rail’s maximum acceleration、rail’s maximum displacement、bed slab’s maximum acceleration, bed slab’s maximum displacement, support layer’s maximum displacement., vertical wheel-rail force and maximum pressure on backing plate under rail caused by the general speed locomotive vehicle is bigger than those caused by motor train. The difference of wheel unloading rate caused by the motor train and the general speed locomotive vehicle is small.In a word, with the short wave irregularities on rail, the general speed locomotive vehicle can move safely on the Bi-block ballastless track with the standard of wheel unloading rate. The influence on Bi-block ballastless track by general speed locomotive vehicle is larger than motor train.