摘要
道岔是重载铁路最为薄弱环节之一,针对大秦重载铁路道岔的磨耗磨损问题,通过轮轨型面测量仪测得大秦线路磨耗后道岔型面数据,建立车辆车轮标准型面与不同辙叉型面的有限元模型,计算分析在轴重作用下的匹配情况.结果表明:车轮通过磨耗后辙叉时接触斑相对细长,使车轮与辙叉产生较大的应力集中,随着辙叉磨耗程度的增加,应力集中愈加明显;在不同轴重作用下,轴重的增加使接触斑面积增大,弹塑性变形也有助于降低轮叉接触应力的变化率.
Turnout is one of the weakest links in heavy haul railway. For the wear of turnouts used in Datong-Qinhuangdao heavy haul railway, the finite element models of wagon wheel standard profile and different worn frog profiles are established based on the data measured by wheel-rail profile measuring instrument to calculate the matching under the effect of the axle load by ABAQUS. The results are as follows. When the wheel passes through the worn frog, the contact spot is relatively slender, and the wheel and the frog produce stress concentration. With the increasing of the frog wear, the stress concentration becomes more and more obvious. With the increasing of the axle load, the contact area increases. And the elastic-plastic deformation also helps to reduce the changing rate of the contact stress between wheel and frog.
出处
《北京建筑大学学报》
2017年第4期70-74,共5页
Journal of Beijing University of Civil Engineering and Architecture
基金
国家自然科学基金资助项目(51775031)
"城乡建设与管理"产学研联合研究生培养基地项目(cxy201727)
关键词
童载铁路
道岔
匹配
轴重
等效应力
heavy haul railway
turnout
matching
axle load
equivalent stress
