中国机械工程2018，Vol.29Issue(9)：1115-1119,5.DOI:10.3969/j.issn.1004-132X.2018.09.016
CRH5动车组车轮低温概率疲劳寿命研究
Research on Probabilistic Fatigue Lifes of CRH5 EMU Wheels at Low Temperature
摘要
Abstract
In order to investigate the probabilistic fatigue lifes of wheels for the CRH5 EMU,this paper followed by the comparisons with three extrapolation methods of AASHO,ECCS and CPM,applied CPM method to obtain the p-c-S-N curves of ER8 steel at-40℃temperature and used dynamic and finite element simulation to get probabilistic fatigue lifes of the wheels at-40 ℃. The results show that:the positions 2mm under the wheel treads are the dangerous points to initiate cracks. Besides,the fatigue lifes of wheels under low temperature are insufficient for it is of only 1 740 km under survival rate p and confidence c are 50%. It decreases 23% compared with the life under normal temperature,that is to say,low temperature has a strong impact on fatigue lifes of wheels.关键词
外推法/概念疲劳寿命曲线/疲劳极限/疲劳寿命/动车组Key words
extrapolation/p-c-S-N curves/fatigue limit/fatigue life/electric multiple unit(EMU)分类
机械制造引用本文复制引用
杨柳青,胡明,赵德明,周迅,宋浩,陈文华..CRH5动车组车轮低温概率疲劳寿命研究[J].中国机械工程,2018,29(9):1115-1119,5.基金项目
国家自然科学基金资助项目(U1334204) （U1334204）
