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Kriging-based optimization of functionally graded structures

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Abstract

This work presents an efficient methodology for the optimum design of functionally graded structures using a Kriging-based approach. The method combines an adaptive Kriging framework with a hybrid particle swarm optimization (PSO) algorithm to improve the computational efficiency of the optimization process. In this approach, the surrogate model is used to replace the high-fidelity structural responses obtained by a NURBS-based isogeometric analysis. In addition, the impact of key factors on surrogate modelling, as the correlation function, the infill criterion used to update the surrogate model, and the constraint handling is assessed for accuracy, efficiency, and robustness. The design variables are related to the volume fraction distribution and the thickness. Displacement, fundamental frequency, buckling load, mass, and ceramic volume fraction are used as objective functions or constraints. The effectiveness and accuracy of the proposed algorithm are illustrated through a set of numerical examples. Results show a significant reduction in the computational effort over the conventional approach.

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Funding

This study was financed by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and the Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico (FUNCAP). The authors gratefully acknowledge the financial support provided by these agencies.

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Correspondence to Evandro Parente Jr..

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Conflict of interest

The authors declare that they have no conflict of interest.

Additional information

Responsible Editor: Shikui Chen

Author contribution

Marina Alves Maia: software, formal analysis, validation, investigation, data curation, writing — original draft preparation, review and editing, visualization. Evandro Parente Junior: conceptualization, methodology, software, funding acquisition, project administration, writing — review and editing. Antônio Macário Cartaxo de Melo: resources, supervision, writing — review and editing.

Availability of data and material

The datasets generated during this study will be available online at https://doi.org/10.17632/p57m4yxygk.1.

Code availability

The executable files are available online at the referred repository.

Replication of results

In addition to the material available as supplementary material, the authors believe that sufficient details of the proposed approach have been provided in this paper, allowing the replication of the experiments.

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Maia, M.A., Parente, E. & de Melo, A. Kriging-based optimization of functionally graded structures. Struct Multidisc Optim 64, 1887–1908 (2021). https://doi.org/10.1007/s00158-021-02949-5

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  • DOI: https://doi.org/10.1007/s00158-021-02949-5

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