| 相关情况下可靠性灵敏度分析的矩方法 |
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| 引用本文： | 宋军,吕震宙,袁修开.相关情况下可靠性灵敏度分析的矩方法[J].计算力学学报,2009,26(2):215-220. |
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| 作者姓名： | 宋军 吕震宙 袁修开 |
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| 作者单位： | 西北工业大学,航空学院,西安,710072 |
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| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划，航空基础基金，国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对正态变量具有相关性的可靠性灵敏度分析问题,给出了线性极限状态情况下的解析方法及可靠性灵敏度的通用数字模拟算法,并提出了一种高效的矩方法.在所提的矩方法中,相关变量首先被等效转换为不相关的变量,利用转换的不相关变量空间中均值与方差、相关性特征参数的非耦合性,得到了失效概率对相关变量均值的灵敏度,并且通过利用基本变量方差相同时,相关性描述参数与均值、方差的自然解耦,得到了失效概率对相关系数的灵敏度.在所提方法的适用范围内,其精度和效率令人满意.
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| 关 键 词： | 可靠性 相关变量 灵敏度 矩方法 |
| 收稿时间： | 4/9/2007 12:00:00 AM |
Reliability sensitivity for correlative variables by moment method |
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| SONG Jun,LU Zhen-zhou and YUAN Xiu-kai.Reliability sensitivity for correlative variables by moment method[J].Chinese Journal of Computational Mechanics,2009,26(2):215-220. |
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| Authors: | SONG Jun LU Zhen-zhou and YUAN Xiu-kai |
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| Institution: | School of Aeronautics;Northwestern Polytechnical University;Xi'an 710072;China |
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| Abstract: | For the Reliability Sensitivity(RS) problem with normal correlative variables,an analytical method for linear performance function and a numerical simulation method are presented,and an efficient moment based RS method is presented as well to analyze the reliability sensitivity with the normal correlative variables.In the presented moment based RS method,the correlative variables are firstly transformed into independent variables equivalently.By use of the decoupling between the mean value and the variance,... |
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| Keywords: | reliability correlative variable sensitivity moment method |
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