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A platform for research: civil engineering, architecture and urbanism
Variable-thickness optimization method for shell structures based on a regional evolutionary control strategy
Abstract Shell structures are widely used in various engineering applications due to their efficient load-carrying capacity relative to the material volume. However, the degree of freedom of most structural optimizations is too large to control the overall thickness of shell structures. To address this issue, this paper proposes a variable-thickness structural optimization method for shell structures based on a regional evolutionary control strategy to reduce the overall structural strain energy and volume. The essential object of our method is to define the thickness element as the design variable, which can constrain the external surface of the shell structure and control the thickness variation of its internal surface in the local area. Then, we introduce a regional evolutionary control strategy that can adaptively obtain and update the evolutionary hierarchy centers and dynamically update the evolutionary factors. By alternately performing factor evolutionary optimization and regional evolutionary optimization to minimize the strain energy and volume of shell structures. We demonstrate that variable-thickness shell structures can achieve good static performance and explore the trade-off between the strain energy and volume.
Highlights A thickness optimization method based on regional evolutionary regulation strategy. Define the thickness element as the design variable. The optimization region of the shell structure is divided.
Variable-thickness optimization method for shell structures based on a regional evolutionary control strategy
Abstract Shell structures are widely used in various engineering applications due to their efficient load-carrying capacity relative to the material volume. However, the degree of freedom of most structural optimizations is too large to control the overall thickness of shell structures. To address this issue, this paper proposes a variable-thickness structural optimization method for shell structures based on a regional evolutionary control strategy to reduce the overall structural strain energy and volume. The essential object of our method is to define the thickness element as the design variable, which can constrain the external surface of the shell structure and control the thickness variation of its internal surface in the local area. Then, we introduce a regional evolutionary control strategy that can adaptively obtain and update the evolutionary hierarchy centers and dynamically update the evolutionary factors. By alternately performing factor evolutionary optimization and regional evolutionary optimization to minimize the strain energy and volume of shell structures. We demonstrate that variable-thickness shell structures can achieve good static performance and explore the trade-off between the strain energy and volume.
Highlights A thickness optimization method based on regional evolutionary regulation strategy. Define the thickness element as the design variable. The optimization region of the shell structure is divided.
Variable-thickness optimization method for shell structures based on a regional evolutionary control strategy
Wang, Xinyu (author) / Zhang, Changdong (author) / Liu, Tingting (author) / Liao, Wenhe (author) / Wang, Cong (author)
Thin-Walled Structures ; 172
2021-12-19
Article (Journal)
Electronic Resource
English
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