中南大学学报（自然科学版）2016，Vol.47Issue(12)：4269-4275,7.DOI:10.11817/j.issn.1672-7207.2016.12.040
基于车轨耦合和扣件精细模型的弹条疲劳分析
Fatigue analysis of spring clip based on vehicle-track coupled model and detailed fastener model
摘要
Abstract
Aiming at the fatigue fracture problem of rail fastening spring clip, a numerical simulation method was used to estimate its fatigue life. Firstly, a vehicle-track coupled model was established and the time history curve of rail foot vertical displacement was obtained. Secondly, a detailed fastener model was established, which uses the rail foot displacement curve as input loads. Then, the time history curves of spring clip stress and strain were obtained. Finally, the fatigue life of spring clip was analyzed according to the fatigue analysis method and cumulative damage theory. The results show that the small curve area of spring clip has the lowest fatigue life and is the most prone to damage, which is consistent with the field survey results. In addition, the fatigue life is closely related to the installation height. With the increase of the installation height, the life is sharply reduced. In order to extend the fastener service life, the excessive installation of the spring clip during operation should be avoided.关键词
扣件弹条/疲劳寿命/车轨耦合/精细模型/仿真分析Key words
rail fastening spring clip/fatigue life/vehicle-track coupling/detailed model/simulation analysis分类
交通工程引用本文复制引用
辛涛,杨学敏,肖宏,张琦..基于车轨耦合和扣件精细模型的弹条疲劳分析[J].中南大学学报（自然科学版）,2016,47(12):4269-4275,7.基金项目
国家自然科学基金资助项目(51208034，51578055)；中央高校基本科研业务费专项资金资助项目(2015JBZ012)；中国铁路总公司科技研究开发计划项目(2015G001)(Projects(51208034,51578055) supported by the National Natural Science Foundation of China （51208034，51578055）
Project(2015JBZ012) supported by the Fundamental Research Funds for the Central Universities （2015JBZ012）
Project(2015G001) supported by the Research&Development Program of China Railway Corporation) （2015G001）
