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.
基金资助:国家自然科学基金资助项目（U1334204）
National Natural Science Foundation of China（No. U1334204）
引用本文:
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(09): 1115-1119.
YANG Liuqing;HU Ming;ZHAO Deming;ZHOU Xun SONG Hao;CHEN Wenhua. Research on Probabilistic Fatigue Lifes of CRH5 EMU Wheels at Low Temperature. China Mechanical Engineering, 2018, 29(09): 1115-1119.
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