矩独立重要性分析的Kriging代理模型方法

doi:10.7527/S1000-6893.2015.0248

固体力学与飞行器总体设计

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矩独立重要性分析的Kriging代理模型方法

赵海龙, 岳珠峰, 刘伟

西北工业大学力学与土木建筑学院飞行器可靠性工程研究所, 西安 710129

收稿日期:2015-07-10 修回日期:2015-09-06 出版日期:2016-07-15 发布日期:2015-09-10
通讯作者: 岳珠峰男,博士,教授,博士生导师。主要研究方向:结构与系统的寿命与可靠性理论及其应用、多学科设计优化理论及其应用。Tel.:029-88431002,E-mail:zfyue@nwpu.edu.cn E-mail:zfyue@nwpu.edu.cn
作者简介:赵海龙男,博士研究生。主要研究方向:结构机构可靠性理论与工程应用。Tel.:029-88431002,E-mail:zhaohailong@mail.nwpu.edu.cn;刘伟男,博士,副教授。主要研究方向:结构机构可靠性理论与工程应用。Tel.:029-88431002,E-mail:liuweinpu@163.com
基金资助:
国家自然科学基金（51305350)；陕西省自然科学基金（2013JM6011)；西北工业大学基础研究基金（3102014JCQ01045)

A Kriging surrogate model method for moment-independent importance analysis

ZHAO Hailong, YUE Zhufeng, LIU Wei

Institute of Aircraft Reliability Engineering, School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xi'an 710129, China

Received:2015-07-10 Revised:2015-09-06 Online:2016-07-15 Published:2015-09-10
Supported by:
National Natural Science Foundation of China (51305350); Natural Science Foundation of Shaanxi Province (2013JM6011); Foundation Research Funds of Northwestern Polytechnical University (3102014JCQ01045)

摘要/Abstract

摘要：

结构重要性分析是结构不确定性分析的重要研究内容之一。作为一种矩独立的重要性测度指标，基于失效概率的重要性测度能够有效地反映输入变量的不确定性对结构失效概率的影响。然而，相比于其他形式的重要性测度，对基于失效概率的矩独立重要性测度进行高效准确的求解仍然存在一定的困难。基于此，结合Kriging代理模型提出了一种高效的矩独立重要性分析的新方法。所提方法首先通过较少的实验设计样本构建能够充分近似真实输入输出响应函数的Kriging代理模型，进而通过数值模拟策略对所构建的Kriging模型进行分析，最终求解得到各个输入变量基于失效概率矩独立重要性测度的主效应和总效应，给出各个输入变量对于失效概率的影响程度排序。相比于现有方法，所提方法由于引入Kriging代理模型极大地降低了对响应函数的计算次数，同时保证了重要性分析的计算精度。两个工程应用实例结果表明了所提方法在计算效率和计算精度方面的优势，体现了所提方法良好的适用性。

关键词: 重要性测度, 全局灵敏度, 矩独立, Kriging模型, 代理模型

Abstract:

Structural importance analysis is one of the research focuses on the fields of structural uncertainty analysis. As a kind of moment-independent importance measure index, the failure probability-based importance measure attracts attention of the researchers for the reason of that it can be used to effectively reflect the influence of the input uncertainties on the failure probability. However, compared with other kinds of importance measure indices, there are still some difficulties to accurately and efficiently estimate the failure probability-based moment-independent importance measure. In this context, a highly efficient method for moment-independent importance analysis is proposed. The proposed method firstly constructs a Kriging surrogate model with a slight number of experimental design samples to fully approximate the actual input-output response function. Then, the numerical simulation strategy is adopted to carry out the importance measure analysis of the constructed Kriging model. Finally, the main effect and total effect indices of the failure probability-based importance measure for each input variables can be obtained, the effect ranking order of each input variables on the failure probability can be provided as well. Compared with the existing methods, because of the introduction of Kriging surrogate model, the calculating times of the actual response function are greatly decreased and the computing accuracy is guaranteed as well. The application results of two engineering examples illustrate the superiorities of the proposed method in the aspect of calculating efficiency and accuracy, and indicate its excellent applicability.

Key words: importance measure, global sensitivity, moment-independent, Kriging model, surrogate model

中图分类号:

V19
TB114.3

赵海龙, 岳珠峰, 刘伟. 矩独立重要性分析的Kriging代理模型方法[J]. 航空学报, 2016, 37(7): 2234-2241.

ZHAO Hailong, YUE Zhufeng, LIU Wei. A Kriging surrogate model method for moment-independent importance analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(7): 2234-2241.

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E-mail：hkxb@buaa.edu.cn

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矩独立重要性分析的Kriging代理模型方法

A Kriging surrogate model method for moment-independent importance analysis

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