考虑权重因素的非概率可靠性模型  

NON-PROBABILISTIC MODEL CONSIDERING WEIGHT DETERMINATION

作　　者：方鹏亚[1] 常新龙[1] 简斌[1] 

机构地区：[1]第二炮兵工程学院203教研室,西安710025

出　　处：《机械强度》2011年第2期225-228,共4页Journal of Mechanical Strength

摘　　要：利用区间变量描述参量的不确定性,基于加权平均理论和PDF(possibility degree formula)区间比较法则,依据非概率区间分析方法,建立考虑权重因素的非概率可靠性模型。该模型更进一步地利用数据信息,提高数据积累阶段的可靠性评估精度;将非概率可靠性指标统一到概率可靠度上,有很好的工程应用价值。最后利用算例验证文中提出模型的可行性。The uncertainty parameters are described by interval variables.Based on weight determination theory,PDF（possibility degree formula） for ranking interval numbers and non-probabilistic interval analysis method,a non-probabilistic reliability model considering weight determination is established.In this model,the data information is used more sufficiently,and the estimation of reliability is more accurate in the process of data accumulation.Moreover,it is more helpful to the industrial application that the non-probabilistic reliability index is combined to the probabilistic reliability degree.At last, a numerical example is given to illustrate the effectiveness of the proposed model.

关 键 词：结构可靠性 非概率模型 权重 熵判定 PDF(possibility DEGREE formula)区间比较 

分 类 号：TB114.3[理学—概率论与数理统计] O213.2[理学—数学]