| 表面裂纹疲劳扩展寿命可靠性分析 |
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| 引用本文： | 孙鹏飞,袁杰红. 表面裂纹疲劳扩展寿命可靠性分析[J]. 压力容器, 2011, 28(6): 55-59. DOI: 10.3969/j.issn.1001-4837.2011.06.011 |
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| 作者姓名： | 孙鹏飞 袁杰红 |
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| 作者单位： | 国防科技大学指挥军官基础教育学院,湖南长沙,410072 |
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| 摘 要： | 在线弹簧模型和Paris公式的基础上,提出了对表面裂纹疲劳扩展寿命进行可靠性分析的方法。针对直接Monte Carlo法效率较低的问题,采用拉丁超立方法（LHS）进行随机抽样,以提高计算的收敛速度。考虑裂纹几何尺寸、交变载荷和疲劳参数等的随机性及相关性,求得了给定可靠度下的疲劳寿命和给定寿命下的可靠度。本文结果与已有文献结果具有较好的一致性。该方法简便有效、通用性强,适合于工程应用。
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| 关 键 词： | 表面裂纹 线弹簧模型 拉丁超立方抽样 疲劳裂纹扩展 寿命可靠性 |
Reliability Analysis for Fatigue Propagation Life of Surface Crack |
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| SUN Peng-fei,YUAN Jie-hong. Reliability Analysis for Fatigue Propagation Life of Surface Crack[J]. Pressure Vessel Technology, 2011, 28(6): 55-59. DOI: 10.3969/j.issn.1001-4837.2011.06.011 |
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| Authors: | SUN Peng-fei YUAN Jie-hong |
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| Affiliation: | SUN Peng-fei,YUAN Jie-hong(College of Basic Education for Commanding Officers,National University of Defense Technology,Changsha 410072,China) |
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| Abstract: | A method for reliability analysis for fatigue propagation life of surface crack is presented based on the line-spring model and Paris formula.Aiming at inefficiency of direct Monte Carlo method,latin hypercube sampling(LHS) method was used for random sampling so as to improve convergent velocity of calculation.The fatigue life is obtained at the given reliability and the reliability is obtained at the given life,in consideration of the uncertainty and correlation of parameters such as the crack size,cycle l... |
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| Keywords: | surface cracks line-spring model latin hypercube sampling fatigue crack propagation life reliability |
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