摘要
元件和结构状态从安全向失效转变一般存在一过渡阶段。本文将元件和结构的安全状态处理成为状态空间的模糊集，并将其引入到可靠度和失效概率的计算中。首先建立了考虑元件安全状态模糊性的广义干涉模型，给出了元件安全和失效状态含有模糊信息时广义可靠度和广义失效概率的计算公式，然后给出了以元件的安全余量作为综合变量的广义可靠度和失效概率的计算公式，最后建立了大型结构系统的广义可靠度计算方法。文中还用算例讨论了广义可靠度随安全状态模糊集的隶属函数中两个参数的变化情况。
The safety of componentis treated as a fuzzy set of the structure status universe because of the ambiguous boundary between the safety status and the failure status, and this treatment is introduced to the calculation of the reliability and the failure probability.Firstly,the generalized interference model of the component is established based on the fuzzy safety status, and two different methods,i.e.the basic variable one and comprehensive variable one,are used to compute the generalized reliability and the failure probability of the component. Secondly,the generalized reliability method of the component is extended to the structure system. The illustrative examples are used in discuss the change of the generalized reliability along with two parameters of the membership of the safety status fuzzy set.
出处
《机械科学与技术》
CSCD
北大核心
1996年第1期45-50,共6页
Mechanical Science and Technology for Aerospace Engineering
关键词
可靠性
模糊集
失效概率
结构强度
Reliability
Fuzzy set
Failure probability
Membership
