含表面缺陷的压力容器疲劳寿命数值模拟  

Numerical Simulation of Fatigue Life for Pressure Vessels Contained Surface Defects

作　　者：金长义[1] 陈金梅[1] 

机构地区：[1]广西工业职业技术学院,广西南宁530003

出　　处：《化工技术与开发》2012年第10期49-51,共3页Technology & Development of Chemical Industry

基　　金：广西教育厅科研项目(桂教科研200708MS116);广西工业职业技术学院科学研究项目(桂工职院科研2007003001)

摘　　要：针对压力容器的失效分析,考虑几种主要参数的不确定性和随机性,应用蒙特卡罗模拟法抽样计算了服从某种特定分布的随机变量。利用数值积分法编制计算机程序,分别求出在一定可靠度和置信度下的疲劳寿命;求出相应的可靠度和失效概率。比较了不同初始裂纹尺寸和断裂韧性对疲劳寿命的影响,并给出了算例。分析结果表明,方法具有较高的应用价值和工程意义。According to the failure analysis of pressure vessel, and considering several primary uncertain factors, the random variables which had some certain distributions were calculated by Mote-Carlo simulation method. A computer program was developed by numerical integration method, the fatigue life under given reliability and credit degree was gained. The reliability and failure probability of pressure vessel were also obtained. The fatigue life in different crack size was compared, and an example was given. It had great application and engineering significance by analyzing the result.

关 键 词：蒙特卡罗模拟法 可靠度 置信度 疲劳寿命 

分 类 号：TH49[机械工程—机械制造及自动化]