车轮多边形对轮轨静态匹配的影响
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摘要
为了分析车轮多边形对轮轨静态匹配的影响,设定车轮半径在圆周上具有周期性变化,并且考虑车轮横向磨耗的改变,建立多边形车轮空间模型。由于迹线法不适用于多边形车轮,在空间车轮模型上搜索与钢轨距离最小点,得到轮轨接触位置和几何参数。采用Hertz接触理论和Polach蠕滑力模型计算轮轨法向应力和蠕滑力,分析多边形车轮对轮轨接触静力学的影响。计算结果显示:考虑横向磨耗时,多边形车轮的相位对轮轨静态匹配影响比较微弱,周向磨耗会引起轮轨接触斑和法向应力的周期性变化,影响程度随阶次的增加而增强。
The influence of wheel polygonalization on the static matching of wheel and rail is analyzed. Assuming that the radius varies periodically around the wheel and considering the variation of the lateral wear of the wheel, a spatial model for the polygonal wheel is established. Since the trace line method is not suitable for polygonal wheels, the minimum distance between the wheel and rail is searched in the spatial wheel model to obtain the contact position and geometric parameters. The normal contact stress and the creep stress are calculated and the influence of the polygonal wheel on the static contact force of wheel and rail is analyzed by Hertz contact theory and Polach creep force model. The calculation results show that the influence of When lateral wear is considered, phase position of the polygonal wheel on the static matching between wheel and rail is negligible. Circumferential wear can cause periodic changes of wheel-rail contact patch and normal stress and the influence degree increases with increasing of the order.
The influence of wheel polygonalization on the static matching of wheel and rail is analyzed. Assuming that the radius varies periodically around the wheel and considering the variation of the lateral wear of the wheel, a spatial model for the polygonal wheel is established. Since the trace line method is not suitable for polygonal wheels, the minimum distance between the wheel and rail is searched in the spatial wheel model to obtain the contact position and geometric parameters. The normal contact stress and the creep stress are calculated and the influence of the polygonal wheel on the static contact force of wheel and rail is analyzed by Hertz contact theory and Polach creep force model. The calculation results show that the influence of When lateral wear is considered, phase position of the polygonal wheel on the static matching between wheel and rail is negligible. Circumferential wear can cause periodic changes of wheel-rail contact patch and normal stress and the influence degree increases with increasing of the order.
引文
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[2]陈伟,戴焕云,罗仁.高速列车车轮高阶多边形对车辆动力学性能的影响[J].铁道车辆,2014,52(12):4-8.
[3]张雪珊,肖新标,金学松.高速车轮椭圆化对车辆系统行为的影响[J].机械工程学报,2010(16):67-73.
[4]李贵宇.高阶车轮多边形对车辆动力学性能的影响[J].机械工程与自动化,2016(5):42-44.
[5]王忆佳,曾京,罗仁,等.高速列车车轮多边形化对车辆动力学性能的影响[J].四川大学学报(工程科学版),2013(3):176-182.
[6]宋志坤,岳仁法,胡晓依,等.车轮多边形对车辆振动及轮轨力的影响[J].北京交通大学学报,2017,41(6):88.
[7]尹振坤,吴越,韩健.高速列车车轮多边形磨耗对轮轨垂向力的影响[J].铁道学报,2017,39(10):26-32.
[8]王开文.车轮接触点迹线及轮轨接触几何参数的计算[J].西南交通大学学报,1984(1):89-98.
[9]严隽耄,王开文.任意形状轮轨的接触几何关系的计算[J].铁道车辆,1984(2):5.
[10]王福天.车辆系统动力学[M].北京:中国铁道出版社,1994:44-46.
[11]金学松,刘启跃.轮轨摩擦学[M].北京:中国铁道出版社,2004:35-42.
[12] HERTZ H.üeber die berührung fester elastischer K?rper[J]. Journal FüR Reine und Angewandte Mathematik,1882, 92:156-171.
[13] POLACH O. A fast wheel-rail forces calculation computer code[J]. Vehicle System Dynamics, 2000, 33:728-739.