摘要
论述了利用三参数威布尔分布描述机械零件疲劳寿命，并在一定置信度下求Ｒ─Ｓ─Ｎ曲线的方法。即根据试验所得的应力─寿命样本，运用优化方法对三多数威布尔分布参数进行估计；并在一定置信度下，求出不同可靠度的疲劳寿命，进而拟合出Ｃ─Ｒ─Ｓ─Ｎ曲线，求出相应的疲劳极限应力值。
The paper discusses the use of Weibull distribution of three-parameter to describe the fatigue life of machine element, and proposes a new method to fitting R-S-N curves under certain confidence. The parameters of three-parameter Weibull distribution are estimated by optimization, based on the samples of stress-life from tests. The fatigue life at each different reliability is then calculated under centain confidance. Thereafter the C-R-S-N curves can be fitted and the corresponding fatigue limit stress is evaluated
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1994年第5期425-430,共6页
Journal of University of Science and Technology Beijing
基金
国家"七五"攻关课题
