Optimal design of internal structure of rectangular cabin under internal pressure
<b>[Objectives]</b> In order to efficiently reduce the bending stress of a grillages in a rectangular cabin under internal pressure,mathematical models for the optimization of the vertical positions of platforms and size and layout of pillars are proposed respectively.<b>[Methods]&...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Editorial Office of Chinese Journal of Ship Research
2017-12-01
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| Series: | Zhongguo Jianchuan Yanjiu |
| Subjects: | |
| Online Access: | http://www.ship-research.com/EN/Y2017/V12/I6/81 |
| _version_ | 1811308028204417024 |
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| author | CHEN Yangke YU Enen LUO Wei WANG Hongxu CHENG Yuansheng |
| author_facet | CHEN Yangke YU Enen LUO Wei WANG Hongxu CHENG Yuansheng |
| author_sort | CHEN Yangke |
| collection | DOAJ |
| description | <b>[Objectives]</b> In order to efficiently reduce the bending stress of a grillages in a rectangular cabin under internal pressure,mathematical models for the optimization of the vertical positions of platforms and size and layout of pillars are proposed respectively.<b>[Methods]</b> The vertical positions of the two internal platforms are taken as the design variables,the maximum bending stress of the transverse and longitudinal bulkhead structure is minimized,and the optimal positions of the internal platforms are obtained via a genetic algorithm. The optimization results show that the best positioning of platforms is close to the vertical uniform distribution. A stepwise optimal pillar design method is proposed. First,the maximum bending stress of the top deck structure is minimized by taking the positions of pillars with the same stiffness as the design variables. Through the repeated use of the model,optimal layout schemes under different numbers of pillars can be obtained in succession. The number and layout of the pillars are then selected according to the stress constraints. To further reduce the maximum bending stress of the top deck structure under a given number and layout of pillars,a mathematical model for the optimal variable stiffness of pillars is proposed. In this study,pillar cross-section size is treated as a design variable,the weight of the pillars in the previous round of optimization design is treated as the constraint,and the maximum bending stress of the top deck structure is minimized.<b>[Results]</b> The optimization results show that the pillars in the central zone are large than those in other regions. By using the proposed optimal design models,the maximum bending stress of the transverse and longitudinal bulkheads and top deck is reduced by 28.3%,25.7% and 13.9% respectively.<b>[Conclusions]</b> The proposed method can provide reference points for comparable structural design. |
| first_indexed | 2024-04-13T09:15:45Z |
| format | Article |
| id | doaj.art-a89040c5f9af4cdcac32f857eea0478e |
| institution | Directory Open Access Journal |
| issn | 1673-3185 1673-3185 |
| language | English |
| last_indexed | 2024-04-13T09:15:45Z |
| publishDate | 2017-12-01 |
| publisher | Editorial Office of Chinese Journal of Ship Research |
| record_format | Article |
| series | Zhongguo Jianchuan Yanjiu |
| spelling | doaj.art-a89040c5f9af4cdcac32f857eea0478e2022-12-22T02:52:45ZengEditorial Office of Chinese Journal of Ship ResearchZhongguo Jianchuan Yanjiu1673-31851673-31852017-12-01126818510.3969/j.issn.1673-3185.2017.06.012201706012Optimal design of internal structure of rectangular cabin under internal pressureCHEN Yangke0YU Enen1LUO Wei2WANG Hongxu3CHENG Yuansheng4School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaChina Ship Development and Design Center, Wuhan 430064, ChinaSchool of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China<b>[Objectives]</b> In order to efficiently reduce the bending stress of a grillages in a rectangular cabin under internal pressure,mathematical models for the optimization of the vertical positions of platforms and size and layout of pillars are proposed respectively.<b>[Methods]</b> The vertical positions of the two internal platforms are taken as the design variables,the maximum bending stress of the transverse and longitudinal bulkhead structure is minimized,and the optimal positions of the internal platforms are obtained via a genetic algorithm. The optimization results show that the best positioning of platforms is close to the vertical uniform distribution. A stepwise optimal pillar design method is proposed. First,the maximum bending stress of the top deck structure is minimized by taking the positions of pillars with the same stiffness as the design variables. Through the repeated use of the model,optimal layout schemes under different numbers of pillars can be obtained in succession. The number and layout of the pillars are then selected according to the stress constraints. To further reduce the maximum bending stress of the top deck structure under a given number and layout of pillars,a mathematical model for the optimal variable stiffness of pillars is proposed. In this study,pillar cross-section size is treated as a design variable,the weight of the pillars in the previous round of optimization design is treated as the constraint,and the maximum bending stress of the top deck structure is minimized.<b>[Results]</b> The optimization results show that the pillars in the central zone are large than those in other regions. By using the proposed optimal design models,the maximum bending stress of the transverse and longitudinal bulkheads and top deck is reduced by 28.3%,25.7% and 13.9% respectively.<b>[Conclusions]</b> The proposed method can provide reference points for comparable structural design.http://www.ship-research.com/EN/Y2017/V12/I6/81rectangular cabin under internal pressureoptimal designinternal platformpillar layout |
| spellingShingle | CHEN Yangke YU Enen LUO Wei WANG Hongxu CHENG Yuansheng Optimal design of internal structure of rectangular cabin under internal pressure Zhongguo Jianchuan Yanjiu rectangular cabin under internal pressure optimal design internal platform pillar layout |
| title | Optimal design of internal structure of rectangular cabin under internal pressure |
| title_full | Optimal design of internal structure of rectangular cabin under internal pressure |
| title_fullStr | Optimal design of internal structure of rectangular cabin under internal pressure |
| title_full_unstemmed | Optimal design of internal structure of rectangular cabin under internal pressure |
| title_short | Optimal design of internal structure of rectangular cabin under internal pressure |
| title_sort | optimal design of internal structure of rectangular cabin under internal pressure |
| topic | rectangular cabin under internal pressure optimal design internal platform pillar layout |
| url | http://www.ship-research.com/EN/Y2017/V12/I6/81 |
| work_keys_str_mv | AT chenyangke optimaldesignofinternalstructureofrectangularcabinunderinternalpressure AT yuenen optimaldesignofinternalstructureofrectangularcabinunderinternalpressure AT luowei optimaldesignofinternalstructureofrectangularcabinunderinternalpressure AT wanghongxu optimaldesignofinternalstructureofrectangularcabinunderinternalpressure AT chengyuansheng optimaldesignofinternalstructureofrectangularcabinunderinternalpressure |