考虑模型性不确定性的应力-强度干涉模型
Stress-strength interference model including model uncertainty
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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\beta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.Abstract: Model uncertainty of design variables is investigatedbased on traditional stress-strength interference model in this paper. Modeluncertainty source was first studied and a random variable H was introducedto describe the uncertainty. The distribution of parameter H and itscalculation method H corresponding to different sample sizes were given.Finally, an interval stress-strength interference model with modeluncertainty was developed with.the algorithm of reliability index \beta .The results show that the proposed model in the present paper is suitablefor describing the model uncertainty.
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