北京交通大学学报2017，Vol.41Issue(6)：130-135,6.DOI:10.11860/j.issn.1673-0291.2017.06.020
12号合金钢组合辙叉单开道岔疲劳裂纹萌生寿命预测
Prediction of rail fatigue crack initiation life of No.12 alloy steel single turnout with combined frog
摘要
Abstract
The static and dynamic analysis models of No.12 alloy steel single turnout with combined frog are established based on finite element analysis software.The fatigue sensitive are-as of turnout rail are located by the dynamic simulation results of the dynamic model when the train is passing through the turnout in a straight or branch line,the load spectrums of each sensi-tive area are extracted for fatigue analysis.The internal stress of rails in each sensitive area under unit load are researched by the static model.The fatigue crack initiation lives of rails in sensitive areas are predicted based on Miner linear cumulative rule.The effects of axle-weight and vehicle speed on the fatigue crack initiation lives of rails are studied.A prediction formula of fatigue crack initiation lives of rails in sensitive areas under different axle loads and vehicle speeds is given.The results show that the fatigue crack initiation lives of rails in different sensitive areas of turnout va-ries greatly,and axle-weight and vehicle speed when the train is passing through the turnout in the branch line have great effects on the fatigue crack initiation lives of rails.The fatigue crack in itiation life decreases significantly with the increase of axle-weight,and it also decreases with the vehicle speed when the train is passing through the turnout in the branch line.关键词
铁路轨道/合金钢单开道岔/组合辙叉/疲劳裂纹/萌生寿命/Miner线性累积法则Key words
railway track/alloy steel single turnout/combined frog/fatigue crack/initiation life/Miner linear cumulative rule分类
交通工程引用本文复制引用
刘启宾..12号合金钢组合辙叉单开道岔疲劳裂纹萌生寿命预测[J].北京交通大学学报,2017,41(6):130-135,6.基金项目
中国铁路总公司科技研究开发计划重大课题(Z2015-G002) Science and Technology Research and Development Major Program of China Railway Corporation(Z2015-G002) （Z2015-G002）
