• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (18): 344-365.doi: 10.3901/JME.2025.18.344

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Adaptive Multi-fidelity Kriging Model-assisted First-order Reliability Analysis Method

MENG Debiao1,2, YANG Hengfei1,2, YANG Shiyuan3, SU Xiaoyan4, ZHU Shunpeng1   

  1. 1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731;
    2. Institute of Electronic and Information Engineering of UESTC in Guangdong, Dongguan 523808;
    3. Faculty of Engineering, University of Porto, Porto 4150-564, Portugal;
    4. School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090
  • Received:2024-10-12 Revised:2025-03-25 Published:2025-11-08

Abstract: Structural reliability analysis is crucial for ensuring the safe and reliable operation of engineering equipment. The accuracy of traditional first-order reliability methods and their improved algorithms is limited by the type of limit state functions and gradient information,which may not be applicable to certain complex engineering cases. In the face of increasingly complex engineering scenarios,although the establishment strategies for multi-fidelity models have been widely studied,their application potential in reliability analysis remains to be further developed. Therefore,an adaptive Multi-Fidelity Kriging (MF-Kriging) model-assisted first-order reliability analysis method is proposed in this study. Firstly,the first-order reliability analysis problem is transformed into an unconstrained optimization problem through the augmented Lagrange function,enabling the use of heuristic optimization algorithms for its solution. Secondly,adaptive MF-Kriging modeling is employed by integrating multiple data sources to further reduce the computational cost of reliability analysis. Based on this reliability analysis method,any adaptive MF-Kriging modeling strategy,whether global or local search,can be nested. Additionally,considering that one of the important steps of the first-order reliability method is to accurately locate most probable point(MPP),this study proposes a hybrid MF-Kriging modeling strategy. By balancing a global search strategy with a local search strategy based on iterative MPP neighborhood,it achieves a trade-off between local accuracy and global convergence in reliability analysis. Finally,the proposed method was applicated through four mathematical examples and three engineering cases. The results illustrate that the proposed method offers significant advantages in terms of accuracy,efficiency,and robustness.

Key words: structural reliability analysis, first-order reliability method, multi-fidelity Kriging model, heuristic optimization algorithms

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