一系垂向悬挂对重载货车轮轨动力作用的影响

摘要

The effects of the primary vertical suspension on the dynamic mechanics of heavy haul freight cars were analyzed by simulation to decrease dynamic wheel/rail interactions through optimizing the parameters of the primary vertical suspension. The vehicle-track coupling dynamics and the method of optimal matching design were applied in the simulation. The simulation results indicated that the primary vertical stiffness had little effect on the dynamic wheel/rail interactions; when at high values, the primary vertical damping decreased the vibrations of track structure, but increased those of car body; and the preferable primary vertical damping was 50-500 kN ? S/m.%为了实现机车车辆低动力作用,基于车辆/轨道耦合动力学原理,应用车辆与线路最佳匹配设计方法和车辆/轨道空间耦合动力学模型,仿真分析了重载货车一系垂向悬挂对轮轨动力作用的影响,优化了一系悬挂参数,降低了重载货车轮轨动力的相互作用.研究结果表明:一系垂向刚度对车辆轮轨动力作用影响甚微,一系垂向阻尼在高量值范围增加阻尼值,减轻轨道结构的振动,加剧车辆本身振动；重载货车一系垂向阻尼取50～500 kN·s/m为宜.