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A crashworthiness optimization method of subway underframe structures based on the differential evolution of the weighted graph representation

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Abstract

The crashworthiness optimization of the subway end structure is essentially a topology–shape–size collaborative optimization problem of a composite structure under collision conditions. To this end, a rapid multivariate co-optimization method based on weighted graph model and differential evolution algorithm is proposed. The underframe configuration is mapped as a weighted graph and then represented by mathematical matrices. By parameter inversion, a basic parametric simplified finite element model is established and validated by the detailed finite element model and the impact test. Three different configuration optimizations are accomplished and compared to prove the efficiency of the proposed method. The research results of this paper provide a reliable method and a reference for the further development of the crashworthiness optimization for complex structures.

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Acknowledgements

The research presented in this paper was conducted with the support of the National Key Research and Development Program of China (Grant No. 2021YFB3703801), the Hunan Provincial Natural Science Foundation of China (Grant No. 2021JJ30853), and the Leading Talents of Science and Technology of Hunan Province (Grant No. 2019RS3018).

Funding

Funding was provided by the National Key Research and Development Program of China (Grant No. 2021YFB3703801), Natural Science Foundation of Hunan Province (Grant No. 2021JJ30853), and the Leading Talents of Science and Technology of Hunan Province (Grant No. 2019RS3018).

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Correspondence to Jie Xing.

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Replication of results

The results reported in this research were performed in MATLAB (main procedure) and Tcl/Tk (pre/post-procedure of the crushing analysis). The authors will help interested researchers reproduce the results given in the article. Interested readers can contact the corresponding author for basic codes of this research with reasonable requests.

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Yao, S., Zhou, Y., Xing, J. et al. A crashworthiness optimization method of subway underframe structures based on the differential evolution of the weighted graph representation. Struct Multidisc Optim 67, 62 (2024). https://doi.org/10.1007/s00158-024-03780-4

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  • DOI: https://doi.org/10.1007/s00158-024-03780-4

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