ACTA AERONAUTICAET ASTRONAUTICA SINICA >
An efficient surrogate method for analyzing parameter global reliability sensitivity
Received date: 2022-06-22
Revised date: 2022-07-14
Accepted date: 2022-07-28
Online published: 2022-08-17
Supported by
National Natural Science Foundation of China(12002237);Natural Science Foundation of Chongqing(CSTB2022NSCQ-MSX0861);Guangdong Basic and Applied Basic Research Foundation(2022A1515011515);Fundamental Research Funds for the Central University(D5000211035)
To give an efficient analysis of parameter reliability global sensitivity， this paper proposes a method by integrating the single-loop importance sampling technique and the adaptive Kriging model. First， a single-loop importance sampling algorithm for estimating the parameter reliability global sensitivity is constructed based on the Bayes theorem， Metropolis-Hastings algorithm and Edgeworth expansion， which unifies the analyses of reliability and parameter reliability global sensitivity. Based on the proposed single-loop importance sampling algorithm， the estimation of the parameter reliability global sensitivity is converted into the identification of states （failure or safety） of all unconditional importance sampling samples， so that each parameter reliability global sensitivity can be evaluated by repeatedly using the unconditional importance sampling samples. Secondly， the Kriging model surrogating the performance function is adaptively constructed to approximate the optimal importance sampling Probability Density Function （PDF） and then generate the corresponding importance samples. Finally， the Kriging model used to construct the approximately optimal importance sampling PDF is continuously updated among the candidate sampling pool of the generated importance samples until the states of all importance samples are accurately identified by the Kriging model. Based on the accurately identified states of all importance samples， parameter global reliability sensitivity of each uncertain distribution parameter is assessed.Results of a numerical example and a missile wing structure verify the efficiency and accuracy of the proposed method.
Wanying YUN , Zhenzhou LYU . An efficient surrogate method for analyzing parameter global reliability sensitivity[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(12) : 227670 -227670 . DOI: 10.7527/S1000-6893.2022.27670
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