中国铁道科学2017，Vol.38Issue(5)：85-92,8.DOI:10.3969/j.issn.1001-4632.2017.05.12
车轮型面磨耗诱发高速铁路轮轨接触几何参数时变的规律
Time-Varying Regularity of Wheel/Rail Contact Geometric Parameters of High Speed Railway Caused by Wheel Profile Wear
摘要
Abstract
The track system is considered as a viscoelastic force element without mass.With multi-body dynamics software UM,the vehicle-track coupling dynamics model for the single carbody of CRH2 high speed train is built.Combined with the wheel/rail non-elliptic rolling contact model and wheel profile wear evolution model,with the maximum depth of wheel wear of 0.1 mm as the update condition for wheel profile,the time-varying regularities of such geometric parameters as the radius of the rolling circle,equivalent taper,contact angle and contact point distribution were studied through the dynamic simulation under the influence of track system vibration,the nonlinearity of vehicle suspension force and the geometric nonlinearity of the wheel/rail contact.Results show that the accuracy of the model is verified by the comparison results between the simulations and field tests of wheel profile wear and the wear at nominal rolling circle radius under different operating mileage.With the increase of operation time and mileage,the wheel profile wear will have a significant impact on the wheel-rail contact geometry parameters.Among which,the equivalent taper,the difference of rolling circle radius and contact angle changes obviously in the process from 0 gradually to 100 thousand km operating mileage,and changes slowly from 100 thousand km gradually to 200 thousand km.Then in the process from 200 thousand km gradually to 250 thousand km,the wheel profile wear is further intensified.The variations of equivalent taper,the difference of rolling circle radius and the contact angle increase sharply.The wheel/rail contact point distribution evolves from one-point contact to two-point contact gradually along with the increase of operating mileage,the dynamic performance of the vehicle also decreases.关键词
车轮型面磨耗/轮轨接触/几何参数/滚动圆半径/等效锥度/接触角/动力学仿真/高速列车Key words
Wheel profile wear/Wheel/rail contact/Geometric parameter/Rolling circle radius/Equivalent taper/Contact angle/Dynamics simulation/High speed train分类
交通工程引用本文复制引用
肖乾,昌超..车轮型面磨耗诱发高速铁路轮轨接触几何参数时变的规律[J].中国铁道科学,2017,38(5):85-92,8.基金项目
国家自然科学基金资助项目(51565013) （51565013）
江西省杰出青年人才资助计划项目(20171BCB23058) （20171BCB23058）
西南交通大学牵引动力国家重点实验室开放课题(TPL1407) （TPL1407）
