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| A strategy for structural shape optimization based on global-local technique |
| Received:August 06, 2020 Revised:October 22, 2020 |
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| DOI：10.7511/jslx20200806001 |
| KeyWord:structural shape optimization stress concentration global-local technique finite element method gradientless optimization |
| Author | Institution |
| 吴志学 |
扬州大学 机械工程学院, 扬州 |
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| Abstract: |
| A global-local technique based optimization method is proposed with the aim of solving the contradiction between efficiency and accuracy for shape optimization design of large-scale structures.Firstly, the merits and demerits of two optimization approaches, with and without cut-boundary displacement modification, are analyzed and discussed.Secondly, combining the global-local technique and gradientless shape optimization method, a dual loop optimization procedure is developed.Finally, numerical results are presented to validate and demonstrate the feasibility, effectiveness and accuracy of this optimization strategy in achieving an optimal design.The results show that the implementation of the global-local technique based optimization method can lead to considerable improvements in optimizing local shapes of large-scale structures with reasonable efficiency and accuracy. |