摘要
以C80型货车为例建立车辆动力学模型,利用FASTSI M算法计算出接触斑内蠕滑力的大小和分布,依据Pearce,Zobory,Jendel和Braghin 4种磨耗模型计算轴重、速度、曲线半径和车轮硬度对车轮踏面磨耗的影响程度。结果表明:轴重从21 t提高到25 t时,由Pearce模型计算出的踏面磨耗率是Zobory模型的5.05～4.22倍、Jendel模型的3.77～1.86倍、Braghin模型的15.29～12.35倍;运行速度从60 km.h-1提高到120 km.h-1时,由Pearce模型计算出的踏面磨耗率是Zobory模型的5.13～4.5倍、Jendel模型的3.46～1.4倍、Braghin模型的12.48～16.96倍;曲线半径从5 000 m减小到300 m时,由Pearce模型计算出的磨耗率是Zobory模型的6.06～4.2倍、Jendel模型的1.82～0.91倍、Braghin模型的23.97～13.0倍;直线上车轮磨耗主要发生在踏面接触区,焊接构架式转向架的最大磨耗深度是三大件式的6.4倍、径向式的14倍;曲线上车轮磨耗主要发生在轮缘接触区,焊接构架式转向架最大磨耗深度是三大件式的4.4～1.25倍、径向式的1 126～47.7倍。与试验结果比较表明,Jendel模型能够真实反映车轮踏面磨耗的机理。
Vehicle dynamic model of C80 wagon was built and the FASTSIM algorithm was used to calculate the size and the distribution of the creep force in the contact patch.The effects of the axle load,the velocity,the curve radius and the wheel hardness on the wear of the wheel tread were analyzed based on four wear models： Pearce,Zobory,Jendel and Braghin.The results indicate that the wear rate of the wheel tread calculated by Pearce model is 5.05～4.22,3.77～1.86,15.29～12.35 times of that by Zobory,Jendel and Braghin model respectively when the axle load is increased from 21 t to 25 t.The wear rate of the wheel tread calculated by Pearce model is 5.13～4.5,3.46～1.4,12.48～16.96 times of that by Zobory,Jendel and Braghin model respectively when the running speed is accelerated from 60 to 120 km·h-1.The wear rate of the wheel tread calculated by Pearce model is 6.06～4.2,1.82～0.91,23.97～13.0 times of that by Zobory,Jendel and Braghin model respectively when the curve radius is decreased from 5 000 to 300 m.When the vehicle running on the straight line,the wheel wear mainly occurs on the wheel tread,and the max wheel wear depth of the welded-frame bogie is 6.4 times of 3-piece bogie′s and 14 times of the radial bogie′s.On the curve line,the wheel wear mainly occurs on the wheel flange,and the max wheel wear depth of the welded-frame bogie is 4.4～1.25 times of 3-piece bogie′s and 1 126～47.7 times of the radial bogie′s.Compared with the test results,it shows that Jendel model can truly reflect the wear mechanism of the wheel tread.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2010年第5期66-72,共7页
China Railway Science
基金
国家自然科学基金资助项目(50821063)
国家科技支撑计划项目(2007BAG05B06)
中央高校基本科研业务费专项资金资助项目(SWJTU09ZT07)
