摘要
利用三参数威布尔分布对疲劳试验数据进行５０％置信度下的分布拟合，根据拟合结果，进一步利用最小二乘法对任意置信度（除５０％外）下的分布按二次曲线进行拟合。以此为基础，用一元线性回归法可求得任意置信度下的可靠度－应力－寿命曲线和疲劳极限。从而为可靠性设计提供更为全面的基础数据。
Fatigue test data s distribution under the confidence of 50% is fitted with Weibull distribution of three parameter. Using the fitting results, distributions under other degrees of conficdence are fitted according to conic by least square method. Basing on this, C R S N curves under any degree of confidence can be fitted by monadic linear regression method, and fagigue limit stress can be evaluated.Then ,more basic data can be afforded for reliability design.
出处
《机械科学与技术》
CSCD
北大核心
1999年第4期659-661,共3页
Mechanical Science and Technology for Aerospace Engineering
