工程结构中存在着诸多不确定性因素,可靠性方法是处理不确定因素的有效途径之一。针对大量工程结构中存在混合不确定信息的问题,提出了一种适用于工程的混合不确定性可靠度计算方法。将模糊变量转化为区间变量,基于体积比的区间可靠性模型,建立了含模糊-区间混合变量的结构非概率可靠性模型。由于该可靠性模型意义明确,对模糊信息的处理也比较合理,可作为混合可靠性计算方法的一种补充。应用此可靠性模型对某飞机机翼结构进行了优化设计,实例计算说明了该文的方法是有效和可行的。 There are many uncertain factors in the engineering structure, and the reliability method is one of the effective ways to deal with the uncertain factors. Aiming at the problem of mixed uncertain information in a large number of engineering structures, a method for calculating the reliability of mixed uncertainties is proposed. The fuzzy variables are transformed into interval variables. Based on the interval reliability model of volume ratio, a structural non-probabilistic reliability model with fuzzy-interval mixed variables is established. Due to the clear meaning of the reliability model, the fuzzy information processing is more reasonable and can be used as a supplement to the hybrid reliability calculation method. The reliability model is applied to optimize the wing structure of an aircraft. The example calculation shows that the proposed method is effective and feasible.