摘要
基于非Hertz滚动接触理论利用数值计算方法详细分析了静态接触情况下,横移量和摇头角对轮轨接触质点间蠕滑力、接触斑粘滑区的分布、等效应力的影响。通过数值计算表明:横移量、摇头角的变化对轮轨滚动接触行为的影响是同时存在并且相互影响的。随着横移量的增加,接触斑的滑动区逐渐增大,粘着区面积逐渐减小,横向移动分量逐渐增大,最大应力值逐渐减小;随着摇头角的增大,接触斑上滑移区面积和最大剪应力和等效应力值均逐渐增大,直至接触斑处于全滑动状态,当轮轨接触斑上的切向力达到饱和时,摇头角对接轮轨接触斑上的蠕滑力、粘滑区分布和应力分布没有影响,计算结果对研究轮轨滚动接触疲劳提供一定的参考价值。
According to the theory of Non-Hertz rolling contact, the effects of traverse and yaw angel on creepage forces, sticklslip areas of cantact of wheel^rail,yon miss stress of contact particles of wheel^rail was investigated with numerical methods.The results indicated that the variation of traverses and yaw angle had simultaneous and mutual effect on rolling contact of wheel-rail;with the traverse growth,the slip area of contact zone was increasing, and the stick area was decreasing and lateral component gradually en- larged,and the value of maximum stress was reductive.With the yaw angel accelerated,the slip area of con- tact zone and the maximum stress or equivalent stress were not increasing until the contact zone was in the whole slip state.The yaw angle had no effect on the creep force ,variation of sticklslip areas of contact zone and the stress when the tangential farce was saturated.The result of calculation had a reference value on the rolling contact of wheel^rail.
出处
《机械设计与制造》
北大核心
2012年第12期31-33,共3页
Machinery Design & Manufacture
基金
国家自然科学基金项目(50875221)
国家973计划项目(2007CB714702)
教育部创新团队科学基金(IRT0452)
关键词
轮轨接触
横移量
摇头角
钢轨磨损
Contact of Wheel/Rail
Traverse
Yaw Angel
Wear of Rail
