航空学报 > 1996, Vol. 17 Issue (S1): 48-52

强度和寿命分布模型的统一描述与检验

董聪, 戎海武, 何庆芝   

  1. 北京航空航天大学飞机设计研究所, 北京, 100083
  • 收稿日期:1995-03-17 修回日期:1995-08-20 出版日期:1996-11-25 发布日期:1996-11-25

UNIVERSAL DISTRIBUTION MODEL OF STRENGTH AND LIFE AND ITS TEST

Dong Cong, Rong Haiwu, He Qingzhi   

  1. Institute of Aircraft Design, Beijing University of Aeronautics and Astronautics, Beijing, 100083
  • Received:1995-03-17 Revised:1995-08-20 Online:1996-11-25 Published:1996-11-25

摘要: 证明了:①三参数Weibul分布可有效地拟合正态数据和对数正态数据;②两参数Weibul分布(B1)、正态分布(B2)、对数正态分布(B3)和三参数Weibul分布(B4)的B基值间存在以下关系B1<B2<B3<B4;③在工程中常见的情况下,以三参数Weibul分布拟合正态数据和对数正态数据,其B基值的相对估值误差ε<5%。

关键词: 强度, 寿命, Weibul分布B基值

Abstract: It is proved that: ①It is feasible using 3 parameter Weibull distribution to fit normal or lognormal data, ②The following relationship exists: B 1< B 2< B 3< B 4, among which, B 1, B 2, B 3 and B 4 is B value of 2 parameter Weibull, normal, lognormal and 3 parameter Weibull distribution respectively, ③In the case of general engineering application, the relative error ε of B value is lower than 5 percent when 3 parameter Weibull distribution is used to fit normal or lognormal data.

Key words: strength life, Weibull distribution, Bvalue

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