摘要
传统干涉模型未考虑设计变量的模型性不确定性影响.通过讨论模型性不确定性的来源,以概率应力-强度干涉模型为基础引入描述模型性不确定性的随机变量H.分析了H的分布形式,并分别给出了大、小样本容量时H分布参数的计算方法,从而建立了考虑模型性不确定性的应力-强度干涉模型,同时给出了可靠性指标β的算法.分析结果表明该文提出的干涉模型可以很好地描述模型性不确定性.
Model uncertainty of design variables is investigated based on traditional stress-strength interference model in this paper.Model uncertainty source was first studied and a random variable H was introduced to describe the uncertainty.The distribution of parameter H and its calculation method H corresponding to different sample sizes were given.Finally,an interval stress-strength interference model with model uncertainty was developed with.the algorithm of reliability indexβ.The results show that the propose...
出处
《力学学报》
EI
CSCD
北大核心
2008年第6期834-839,共6页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金资助项目(10377007)~~
关键词
应力-强度干涉模型
模型性不确定性
贝叶斯法
最大熵原理
可靠性
stress strength interference model
model uncertainty
Bayesian method
principle of maximum entropy
reliability
