To enhance the safety of heavy-haul train operations,this study employed numerical simulation to investigate the impact of the impedance of draft gears on the longitudinal dynamic performance of such trains.It examined the impedance features of draft gears,developed a grid-based model for draft gear data,and combined these with braking,traction,and running resistance properties of heavy-haul trains to construct a longitudinal dynamics model for simulation experiments.The findings indicate:(1)Within a coupler force range of 0 to 3.2 kN,risks such as uncoupling may occur;when the coupler force exceeds 6 kN,the draft gears exhibit maximum effectiveness.(2)As the value of the impedance of draft gears increases,the coupler fatigue damage coefficient initially decreases,then stabilizes,before rising again.(3)To minimize the extent of coupler fatigue damage and ensure smooth operation of heavy-haul trains,it is crucial to maintain the coupler force within the range of 2 kN to 6 kN.
维普
万方数据
