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Reliability-based design optimization using kriging surrogates and subset simulation

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Abstract

The aim of the present paper is to develop a strategy for solving reliability-based design optimization (RBDO) problems that remains applicable when the performance models are expensive to evaluate. Starting with the premise that simulation-based approaches are not affordable for such problems, and that the most-probable-failure-point-based approaches do not permit to quantify the error on the estimation of the failure probability, an approach based on both metamodels and advanced simulation techniques is explored. The kriging metamodeling technique is chosen in order to surrogate the performance functions because it allows one to genuinely quantify the surrogate error. The surrogate error onto the limit-state surfaces is propagated to the failure probabilities estimates in order to provide an empirical error measure. This error is then sequentially reduced by means of a population-based adaptive refinement technique until the kriging surrogates are accurate enough for reliability analysis. This original refinement strategy makes it possible to add several observations in the design of experiments at the same time. Reliability and reliability sensitivity analyses are performed by means of the subset simulation technique for the sake of numerical efficiency. The adaptive surrogate-based strategy for reliability estimation is finally involved into a classical gradient-based optimization algorithm in order to solve the RBDO problem. The kriging surrogates are built in a so-called augmented reliability space thus making them reusable from one nested RBDO iteration to the other. The strategy is compared to other approaches available in the literature on three academic examples in the field of structural mechanics.

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Acknowledgements

The first author was funded by a CIFRE grant from Phimeca Engineering S.A. subsidized by the ANRT (convention number 706/2008). The financial support from DCNS is also gratefully acknowledged.

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Authors and Affiliations

  1. Phimeca Engineering, Centre d’Affaires du Zénith, 34 rue de Sarliève, 63800, Cournon d’Auvergne, France

    Vincent Dubourg & Bruno Sudret

  2. IFMA, EA 3867, Laboratoire de Mécanique et Ingénieries, Clermont Université, BP 10448, 63000, Clermont-Ferrand, France

    Vincent Dubourg, Bruno Sudret & Jean-Marc Bourinet

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  1. Vincent Dubourg
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  2. Bruno Sudret
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  3. Jean-Marc Bourinet
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Correspondence to Vincent Dubourg.

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Dubourg, V., Sudret, B. & Bourinet, JM. Reliability-based design optimization using kriging surrogates and subset simulation. Struct Multidisc Optim 44, 673–690 (2011). https://doi.org/10.1007/s00158-011-0653-8

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  • DOI: https://doi.org/10.1007/s00158-011-0653-8

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