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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (2): 226667-226667.doi: 10.7527/S1000-6893.2022.26667

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A RBF and active learning combined method for structural non-probabilistic reliability analysis

Feng JIANG, Huacong LI(), Jiangfeng FU, Linxiong HONG   

  1. School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China
  • Received:2021-11-15 Revised:2021-12-23 Accepted:2022-01-17 Online:2023-01-25 Published:2022-01-26
  • Contact: Huacong LI E-mail:lihuacong@nwpu.edu.cn
  • Supported by:
    National Science and Technology Major Project(2017-V-0013-0065)

Abstract:

When the failure domain and the hyper-ellipsoid uncertainty domain interfere with each other in non-probabilistic reliability analysis, non-probabilistic reliability is more applicable than the non-probabilistic reliability index. To improve the solution efficiency of structural non-probabilistic reliability of the hyper-ellipsoid model, this paper proposes an active learning method to solve non-probabilistic reliability problems. The jackknifing variance of the Radial Basis Function (RBF) model at the unknown point is derived by combining the cross-validation and the jackknifing methods, so as to estimate the uncertainty of the predicted values. To solve the non-probabilistic reliability, the is employed which is based on the variance. Based on the jackknifing variance, non-probabilistic reliability is solved using the active learning function of RBF. An effective convergence criterion is then proposed to terminate the process of active learning of non-probabilistic reliability analysis. Three numerical examples reveal that this method proposed can estimate the exact non-probabilistic reliability value under the condition of less calculation of the limit state function, and has strong applicability in structural non-probabilistic reliability analysis.

Key words: non-probabilistic reliability analysis, hyper-ellipsoidal model, Radial Basis Function (RBF) model, cross-validation, active learning

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