摘要
为研究不均衡闸瓦压力对重载机车轮轨动态行为的影响,以我国实际运营中HXD型六轴重载机车为研究对象,在多体动力学软件UM中建立综合考虑多种非线性力学关系重载机车模型,将制动过程考虑仅有闸瓦压力作用。仿真结果表明:在直线运行条件下紧急制动状态时,当1位轮对出现不均衡制动故障,对重载机车动态行为影响最甚,此时1位轮对横移量、摇头角均是最大幅值,1位轮对较其他轮对,轮对横移量、摇头角最大分别增加46.97%和86.73%;车辆过曲线时分别在1位内轮、3位外轮正常制动工况下,对车辆动态行为影响较大,且各考核工况同样以1位轮对响应最为剧烈。由此可见,端位轮对在所有可能出现故障的轮对中安全隐患较大,故障时出现轮缘贴靠的可能性更大。
In order to study the influence of unbalanced brake-shoe pressure on the dynamic behavior of heavy-haul locomotive wheel track,the typical HXD six-axle heavy-haul locomotive in Chinese actual operation was taken as the research object.The heavy-haul locomotive model was established in the multi-body dynamics software UM with a comprehensive consideration of various nonlinear mechanical relationships.The results show that the dynamic behavior of the heavy-haul locomotive was more affected when the 1st wheelset had an unbalanced braking fault in straight line running condition emergency braking state.At this time the 1st wheelset transverse-quantity,the yaw angle were all the maximum amplitudes.Compared with other wheelsets,the maximum transverse-quantity and yaw angle of 1st wheelset increased by 46.97%and 86.73%,respectively.When the vehicle passed the curve,it had a large impact on the dynamic behavior of the vehicle under the normal braking conditions of 1st inner wheel or 3rd outer wheel.Under these two conditions,the dynamic behavior of the vehicle was greatly affected,and the 1st wheelset response was also the most severe in each assessment condition.It can be seen that the 1st(6th)wheelset had a large safety hazard in all possible failure wheelsets and the wheel flange was more likely to close when the fault occurs.
作者
曹云强
刘鹏飞
张凯龙
刘红军
高昊
CAO Yunqiang;LIU Pengfei;ZHANG Kailong;LIU Hongjun;GAO Hao(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2020年第7期1808-1816,共9页
Journal of Railway Science and Engineering
基金
国家自然科学基金青年基金资助项目(51605315,11790282)
河北省自然科学基金面上资助项目(E2018210052)。
关键词
重载机车
动态行为
多体动力学
不均衡闸瓦压力
制动故障
heavy-haul locomotive
dynamic behavior
multibody dynamics
asymmetric brake shoe pressure
brake failure
