铁道标准设计2018，Vol.62Issue(2)：48-52,5.DOI:10.13238/j.issn.1004-2954.201704120001
瞬时滑动状态下轮轨摩擦系数试验研究
Experimental Research on Wheel/Rail Friction Coefficient under Transient Sliding Condition
摘要
Abstract
To study the transient sliding condition,the influence of load and speed on the wheel/rail friction coefficient,U71 Mn rail is used as the experimental material to analyze the influence of load and speed on the wheel/rail friction coefficient under transient sliding condition based on the second law of friction.The results show that the effect of velocity on the friction coefficient is significant,and the friction coefficient decreases with the increase of the velocity.When the transient sliding speed reaches 2.6 m/s,the friction coefficient is 0.34,which is 10％ lower than the initial measurement speed.The friction is proportional to the increase of load,but the friction coefficient does not change with the load at constant transient sliding speed.When the wheel instantaneously slips,the larger train axle load and smaller wheel spin speed help the wheel to obtain a greater friction,which is beneficial to traffic safety.The friction coefficient under rain instantaneous sliding state is different from that under braking state,thus,corresponding friction coefficient should be selected according to wheel sliding state in engineering and wheel-rail contact analysis.关键词
瞬时滑动/轮轨摩擦系数/速度/荷载/测定/应用Key words
Transient sliding/Friction coefficient of wheel/rail/Speed/Load/Determination/Application分类
交通工程引用本文复制引用
孙安元,吴亚平,陈坤,张晓波..瞬时滑动状态下轮轨摩擦系数试验研究[J].铁道标准设计,2018,62(2):48-52,5.基金项目
国家自然科学基金重点项目(51236003) （51236003）
国家科技支撑计划课题(2014BAG05B05) （2014BAG05B05）
中国铁路总公司科技研究开发计划课题(2015G005-C) （2015G005-C）
