Dynamic parameters of slab track of passenger transport line

The influence of dynamic parameters such as speed,vertical profile irregularity of track,and stiffness and damping of cement asphalt mortar(CA mortar) on vertical vibration of high-speed train and slab track system was studied based on the analysis theory of vertical vibration of the system.The selection range of reasonable stiffness of the CA mortar was obtained.The results show that with the increase of speed and track irregularity amplitude,the responses of vertical vibration of the system increase.The selection range of reasonable stiffness of the CA mortar is 1.0?1.5 GPa/m.The bigger damping value of the CA mortar should be selected to decrease the vibration and extend the cycle life of the slab track.