基于高效搜索方法的可靠性分析改进响应面法

doi:10.13700/j.bh.1001-5965.2019.0169

北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (1): 95-102.doi: 10.13700/j.bh.1001-5965.2019.0169

基于高效搜索方法的可靠性分析改进响应面法

洪林雄, 李华聪, 彭凯, 肖红亮, 张煦

西北工业大学动力与能源学院, 西安 710072

收稿日期:2019-04-18 发布日期:2020-01-21
通讯作者: 李华聪 E-mail:lihuacong@nwpu.edu.cn
作者简介:洪林雄,男,博士研究生。主要研究方向:航空发动机燃油控制系统结构可靠性;李华聪,男,博士,教授,博士生导师。主要研究方向:航空发动机控制系统。
基金资助:
国家自然科学基金（51506176）；航空科学基金（6141B090302）；中央高校基本科研业务费专项资金（G2017KY0003）

Improved response surface method of reliability analysis based on efficient search method

HONG Linxiong, LI Huacong, PENG Kai, XIAO Hongliang, ZHANG Xu

School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China

Received:2019-04-18 Published:2020-01-21
Supported by:
National Natural Science Foundation of China (51506176); Aeronautical Science Foundation of China (6141B090302); the Fundamental Research Funds for the Central Universities (G2017KY0003)

摘要/Abstract

摘要： 针对结构可靠性计算中广泛应用的响应面法计算量大、迭代效率低等问题，提出了一种基于样本点混合加权和可靠性指标变向搜索的改进响应面法。首先，在传统响应面法的权数选取策略基础上，构建一种考虑样本点与设计点距离和样本点极限状态函数值大小的混合加权方法。然后，对每次响应面迭代求解过程中，由于传统一次二阶矩方法求解效率低等问题，基于变向搜索算法，实现对每一次响应面迭代过程中设计点的有效搜索。算例表明，在一定的计算精度下，所提方法具有很好的收敛性，且大幅减少迭代次数，可以获取高精度的最大失效点和可靠性指标。

关键词: 结构可靠性, 响应面法, 混合加权, 一次二阶矩, 变向搜索

Abstract: Aimed at the problems of large amount of calculation and low iteration efficiency of response surface method which is widely used in structural reliability calculation, an improved response surface method based on hybrid weighting of sample points and variable-direction search of reliability index is proposed. Firstly, based on the weight selection strategy of the traditional response surface function, a hybrid weighting method considering not only the distance between the sample point and the design point but also the limit-state-function value of the sample point is constructed. Secondly, due to the inefficiency problem of the traditional first-order second-moment method in each iteration of response surface, an effective search of design points based on the variable-direction search algorithm in each iteration process of response surface is realized. The numerical examples show that the method has good convergence and greatly reduces the number of iterations under certain calculation accuracy. And the maximum failure point and reliability index can be obtained accurately.

Key words: structural reliability, response surface method, hybrid weighted, first-order second-moment, variable-direction search

中图分类号:

洪林雄, 李华聪, 彭凯, 肖红亮, 张煦. 基于高效搜索方法的可靠性分析改进响应面法[J]. 北京航空航天大学学报, 2020, 46(1): 95-102.

HONG Linxiong, LI Huacong, PENG Kai, XIAO Hongliang, ZHANG Xu. Improved response surface method of reliability analysis based on efficient search method[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(1): 95-102.

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基于高效搜索方法的可靠性分析改进响应面法

Improved response surface method of reliability analysis based on efficient search method

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