螺栓联接的模糊可靠性分析  

Fuzzy Reliability Analysis of Bolt Coupling

作　　者：陈金梅[1] 金誉辉 金长义[1] 

机构地区：[1]广西工业职业技术学院,广西南宁530003 [2]广西特种设备监督检验院,广西南宁530022

出　　处：《石油化工设备》2011年第5期29-33,共5页Petro-Chemical Equipment

基　　金：广西教育厅科研项目(桂教科研200911LX500);广西工业职业技术学院科学研究项目(桂工职院科研2009001014)

摘　　要：对应力或强度是设计基本随机变量和设计基本模糊变量的复杂函数,考虑几种主要参数的模糊性和随机性,通过把模糊变量变换为当量随机变量,再利用仅含有当量随机变量的极限状态方程,用传统可靠性理论中的一次二阶矩法和改进的一次二阶矩法对螺栓联接的模糊可靠性进行分析。得到了螺栓联接的可靠性指数和失效概率,并给出了算例。对其进行分析的结果表明,该方法具有较高的实用性和通用性。Several primary fuzzy and random factors were considered in the complex function which was built by the basic random and fuzzy variables of stress or intensity. The fuzzy variables were converted into equivalent random variables which were included in limit sate equations. The fuzzy reliability was analyzed by first order second moment and advanced first order second mo- ment in traditional reliability theory. The reliability index and failure probability of bolt coupling were obtained, and an example was given. It has great practicability and commonality by analy- zing the result.

关 键 词：螺栓联接 模糊变量 随机变量 当量随机变量 一次二阶矩法 可靠性指数 失效概率 

分 类 号：TQ050.2[化学工程] TH131.3[机械工程—机械制造及自动化]