Wang C.,Southwest Jiaotong University |
Ma W.-H.,Southwest Jiaotong University |
Luo S.-H.,Southwest Jiaotong University |
Xu Z.-Q.,Southwest Jiaotong University |
And 2 more authors.
Zhendong yu Chongji/Journal of Vibration and Shock
Based on the vehicle/track coupling dynamics theory, the dynamics characterastics of two kinds of locomotive bogies were analysed and compared. Their influences on traction pins were discussed. Taking a certain type of meter gauge locomotive as an example and considering. The characters of foreign mountain lines, a vehicle and track coupling dynamics model was established by using the dynamics software SIMPACK with the actual working conditions well simulated. Due to the existence of vertical traction clearance, the traction pins as usual are subjected to greater longitudinal impact while the vehicle is running on a poor line in high speed. According to the original scheme, the maximum longitudinal forces acting on three traction pins are 165 kN, 197 kN and 167 kN. In the upswing plan, the forces are 165 kN, 141 kN and 186 kN. The traction pins and horizontal stopper will bear violent collision in small radius curve condition according to the original scheme and the second traction pin will suffer the biggest lateral impact reaching 259 kN. If considering the wheel wear condition, the impact would even reach 785 kN. In the improved plan, the lateral impact on traction pins is small, not more than 45 kN.The results show that the large lateral force acting on traction pins and lateral stop may cause bolts' looseness and fracture, while the vehicle is crossing the small radius curves, on a poor line, longitudinal impact caused by track irregularity may also result in faults. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved. Source