| 相关性对结构系统可靠度的影响 |
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| 引用本文： | 程卫帅,陈进.相关性对结构系统可靠度的影响[J].长江科学院院报,2003,20(3):24-26. |
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| 作者姓名： | 程卫帅 陈进 |
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| 作者单位： | 长江科学院,湖北,武汉,430010 |
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| 基金项目： | 国家自然科学基金资助项目(50099620). |
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| 摘 要： | 相关性对结构系统可靠度有重要影响。一般认为，相关性增加对串联系统的可靠性有利，对并联系统的可靠性不利。结合Hohenbichler和Johnson的公式，对这一结论给出数学上的解释，在证明相关性对串联和并联系统可靠度影响的利弊的同时将其影响程度量化，并以此为基础研究了相关性对串并联混合系统综合可靠度的影响及其影响程度。从而可以更有效地处理可靠性分析中的相关性以及相关数据，提高计算效率，更精确地计算失效概率及可靠指标。
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| 关 键 词： | 结构可靠度 串并联系统 随机变量 概率分布函数 防洪工程体系 |
| 文章编号： | 1001-5485(2003)03-0024-03 |
Effect of correlation on structural system reliability |
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| CHENG Wei-Shuai,CHEN Jin.Effect of correlation on structural system reliability[J].Journal of Yangtze River Scientific Research Institute,2003,20(3):24-26. |
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| Authors: | CHENG Wei-Shuai CHEN Jin |
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| Abstract: | Correlation has an important effect on structural system reliability and it is widely accepted that the increase in correlation is benefit to the reliability of parallel systems and is harmful to that of series systems. A mathematical explanation for this conclusion is given based on Hohenbichler''s and Johnson''s formulas. The effects of correlation on series system and parallel system in both aspects of benefit and harm are proved respectively and the degrees of effect are quantified. Based on this result, the effect of correlation on the series-parallal mixed system and the degree of its effect are studied. And thus this study result will be helpful to deal with the correlation and correlative data treatment more effectively, To compute the failure probability and reliability index more accurately and improve the computational efficiency. |
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| Keywords: | correlation effect system reliability series system of parallel subsystems |
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