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工程力学  2013 

含模糊-区间变量的结构非概率可靠性优化设计

DOI: 1000-4750(2013)06-0036-05, PP. 36-40

Keywords: 非概率可靠性,混合可靠性,可靠性指标,Info-gap(Information-gap)模型,可能性测度,固体力学,结构优化,可靠性,模糊,区间,非概率

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Abstract:

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。

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