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考虑区间变量非概率可靠性模型,采用非概率可靠性指标、安全系数和集合可靠度三类确定性参数描述结构的可靠性和安全程度.通过几何描述,明确地给出了三类参数的物理意义,指出了各自的取值范围和实用区间.从设计思想、度量方法及表现形式方面分析了三类度量的区别,并建立了它们之间的函数关系.研究结果拓展了结构非概率设计理论,并通过具体优化算例对三类度量所得到的结果进行了讨论.
Considering the non-probabilistic reliability model of interval variables, three kinds of deterministic parameters, non-probabilistic reliability index, safety factor and ensemble reliability, are used to describe the reliability and safety of the structure.The geometrical description is given explicitly for three types of parameters Significance and pointed out their respective range of values and practical range.The differences between the three kinds of metrics are analyzed from the aspects of design idea, measurement method and presentation form, and the functional relationship between them is established.The research results expand the theory of non-probability structure design The results obtained from the three types of metrics are discussed through concrete optimization examples.