Optimal design of hierarchical grid-stiffened cylindrical shell structures based on linear buckling and nonlinear collapse analyses
This paper considers the optimization of a grid-stiffened cylindrical shell with weld and transition lands. A surrogate-based optimization framework incorporating the multi-island genetic algorithm (MIGA) is adopted based on linear eigenvalue buckling analysis (LEBA) and nonlinear implicit analysis...
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| Published in | Thin-walled structures Vol. 119; pp. 315 - 323 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.10.2017
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0263-8231 1879-3223 |
| DOI | 10.1016/j.tws.2017.06.019 |
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| Abstract | This paper considers the optimization of a grid-stiffened cylindrical shell with weld and transition lands. A surrogate-based optimization framework incorporating the multi-island genetic algorithm (MIGA) is adopted based on linear eigenvalue buckling analysis (LEBA) and nonlinear implicit analysis (NIA). A novel hierarchical grid design is proposed to avoid undesired local buckling. In addition, the results indicate that the optimization based on LEBA is intended primarily to avoid local failure rather than structure collapse, and thereby deviates from the optimal design. In contrast, the optimization based on NIA yields designs that are closer to the optimal design for engineering application.
•An integral and efficient analysis and optimization framework for the design of stiffened cylindrical shells is presented.•A novel hierarchical grid design is proposed to avoid undesired local buckling.•Optimization framework based on nonlinear implicit analysis is more suitable for the design of complex structures. |
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| AbstractList | This paper considers the optimization of a grid-stiffened cylindrical shell with weld and transition lands. A surrogate-based optimization framework incorporating the multi-island genetic algorithm (MIGA) is adopted based on linear eigenvalue buckling analysis (LEBA) and nonlinear implicit analysis (NIA). A novel hierarchical grid design is proposed to avoid undesired local buckling. In addition, the results indicate that the optimization based on LEBA is intended primarily to avoid local failure rather than structure collapse, and thereby deviates from the optimal design. In contrast, the optimization based on NIA yields designs that are closer to the optimal design for engineering application.
•An integral and efficient analysis and optimization framework for the design of stiffened cylindrical shells is presented.•A novel hierarchical grid design is proposed to avoid undesired local buckling.•Optimization framework based on nonlinear implicit analysis is more suitable for the design of complex structures. |
| Author | Zhang, Ling Chen, Mingji Zhao, Yunong Yang, Fan Fang, Daining |
| Author_xml | – sequence: 1 givenname: Yunong surname: Zhao fullname: Zhao, Yunong organization: State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, PR China – sequence: 2 givenname: Mingji surname: Chen fullname: Chen, Mingji email: mjchen81@163.com organization: Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, PR China – sequence: 3 givenname: Fan surname: Yang fullname: Yang, Fan organization: Beijing Institute of Astronautical Systems Engineering, Beijing 100076, PR China – sequence: 4 givenname: Ling surname: Zhang fullname: Zhang, Ling organization: Beijing Institute of Astronautical Systems Engineering, Beijing 100076, PR China – sequence: 5 givenname: Daining surname: Fang fullname: Fang, Daining organization: State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, PR China |
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| SubjectTerms | Linear buckling analysis Nonlinear collapse analysis Optimization Stiffened cylindrical shell Weight |
| Title | Optimal design of hierarchical grid-stiffened cylindrical shell structures based on linear buckling and nonlinear collapse analyses |
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