摘要
为分析机车牵引力对轮轨关系的影响,在SIMPACK多体动力学软件中分别建立了基于60钢轨和60N钢轨的"机车-轨道"耦合动力学模型,设定了水平轨道和坡道通过曲线的2种工况,分析机车牵引力与轮轨蠕滑关系、最大法向接触应力和RCF损伤系数的关联度。计算结果表明:增加牵引力使轮轨纵向蠕滑率和纵向蠕滑力迅速增加,横向蠕滑力降低,机车在60N钢轨上运行时变化尤为明显;钢轨内侧纵向蠕滑力受牵引力作用方向改变,引起钢轨内侧裂纹方向改变;相比60钢轨,60N钢轨抵抗磨耗的能力较强,但容易产生滚动接触疲劳。
In order to analyze the influence of locomotive traction force on wheel-rail relationship, a locomotive track coupling dynamics model based on 60 kg/m and 60 N rail was established in SIMPACK multi-body dynamics software, and the horizontal track and ramp were set up. The relationship between locomotive traction force and wheel-rail creep, maximum normal contact stress and RCF damage coefficient were analyzed. The results showed that the longitudinal creep rate and longitudinal creep force increase rapidly and the lateral creep force decreases with the increase of traction force, especially when the locomotive is running on the 60 N rail. The longitudinal creep force on the inner side of the rail is changed by the direction of the traction force, which results in the change of the direction of the inner crack of the rail. Compared with the 60 kg/m rail, the 60 N rail has a stronger ability to resist wear, but it is easy to produce rolling contact fatigue.
作者
吴潇
丁军君
黄运华
李芾
WU Xiao;DING Junjun;HUANG Yunhua;LI Fu(School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China)
出处
《机车电传动》
北大核心
2019年第5期25-28,共4页
Electric Drive for Locomotives
基金
中国铁路总公司科技研究开发计划项目(2017G003-A)
四川省青年科技创新研究团队资助项目(2017TD0017)
关键词
牵引力
蠕滑关系
磨耗数
滚动接触疲劳
轮轨关系
动力学
仿真模型
traction force
creep relation
wear number
rolling contact fatigue
wheel-rail relationship
dynamics
simulation model
