| 压力容器的概率局部应力应变疲劳分析’ |
| |
| 引用本文： | 钱桂安,王茂廷,王莲.压力容器的概率局部应力应变疲劳分析’[J].石油化工设备,2005,34(6):40-42. |
| |
| 作者姓名： | 钱桂安 王茂廷 王莲 |
| |
| 作者单位： | 辽宁石油化工大学,机械工程学院,辽宁,抚顺,113001 |
| |
| 摘 要： | 压力容器构件的不确定因素造成了构件局部应力应变响应和疲劳寿命具有随机性。将循环迟滞回线和应变寿命曲线表示为概率曲线,并考虑累积损伤的随机性,反映了构件的不确定性。使用Taylor多项式计算局部应力应变的均值和方差,求出了构件疲劳萌生寿命的均值和方差。计算了一定可靠性下的疲劳萌生寿命,得出了在一定使用寿命时结构的可靠度曲线。算例表明,它可用于疲劳寿命的可靠性估算,具有工程意义。
|
| 关 键 词： | 压力容器 局部应力应变 可靠度 随机分析 |
| 文章编号： | 1000-7466(2005)06-0040-03 |
| 修稿时间： | 2005年5月28日 |
Fatigue analysis of pressure vessel based on probabilistic method for local stress and strain |
| |
| QIAN Gui-an,WANG Mao-ting,WANG Lian.Fatigue analysis of pressure vessel based on probabilistic method for local stress and strain[J].Petro-Chemical Equipment,2005,34(6):40-42. |
| |
| Authors: | QIAN Gui-an WANG Mao-ting WANG Lian |
| |
| Abstract: | The uncertainties of pressure vessel result in the randomness of local stress,local strain and fatigue life.Hysteresis loops and stress-strain are treated as probabilistic curves,random fatigue damage accumulation is also considered to demonstrate the uncertainty of the component.Taylor polynomials are constructed to calculate the mean value and variance of local stress and local strain.The mean value and variance of component fatigue life is also obtained.The fatigue life under a certain reliability and the component reliability curve is gained.An example is given to show that the probabilistic method for local stress and strain has a good engineering significance in fatigue life analysis. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
