α-l型区间可靠性分析方法及其工程应用

摘要

在区间非概率可靠性模型的基础上,以区间长度l和区间下限α为结构系统变量的输入参数,重新定义了一种新的可靠性指标,分析得到了这种可靠性分析方法的判定依据;在此基础上,在线性和非线性条件下讨论了结构可靠度的计算方法.以某型飞机防冰引气管结构为例,进一步探讨了所提方法在共振可靠性分析当中的工程应用.%Based on the interval non-probabilistic reliability model,a new reliability index is defined,in which the interval length l and the interval lower limit αis thought as input parameters of structural sys-tem. At the same time,the judging basis of the reliability analysis method is obtained by analysis,and the reliability calculation method are discussed separately under linear and non-linear condition. Finally,tak-ing anti-icing tube of a certain aircraft for example,the engineering application of this method proposed is further discussed on the resonance reliability analysis.