Multiobjective Topology Optimization of Spatial-Structure Joints
To realize the static and dynamic multiobjective topology optimization of joints in spatial structures, structural topology optimization is carried out to maximize the stiffness under static multiload conditions and maximize the first third-order dynamic natural frequencies. According to the single-...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/5530644 |
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| author | Nanhai Zhu Jinlei Liu |
| author_facet | Nanhai Zhu Jinlei Liu |
| author_sort | Nanhai Zhu |
| collection | DOAJ |
| description | To realize the static and dynamic multiobjective topology optimization of joints in spatial structures, structural topology optimization is carried out to maximize the stiffness under static multiload conditions and maximize the first third-order dynamic natural frequencies. According to the single-objective optimization results, the objective function of the multiobjective topology optimization of joints is established by using the compromise programming method, and the weight coefficient of each static load condition is determined by using the analytic hierarchy process. Subsequently, under the constraint of the volume fraction, the multiobjective topology optimization of joints is realized by minimizing the multiobjective function. Finally, the optimized structure is smoothed to obtain a smoother joint, and its mechanical properties are compared with those of the hollow ball joint. The results indicate that the multiobjective topology optimization that considers the static stiffness and dynamic frequency can effectively improve the mechanical properties of the structure. Through the research on multiobjective topology optimization, a new type of spatial joint with reasonable stress, a novel form, and aesthetic shape can be obtained, which mitigates the shortcomings of single-objective topology optimization. In comparison to hollow spherical joints with the same weight, topology-optimized joints have a superior ability to resist deformation and improve low-order frequency, which verifies the feasibility of applying multiobjective topology optimization to the lightweight design of joints. |
| format | Article |
| id | doaj-art-2389e6d60a0b47929ef3d97f1b4f3cec |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-2389e6d60a0b47929ef3d97f1b4f3cec2025-02-03T05:58:31ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/55306445530644Multiobjective Topology Optimization of Spatial-Structure JointsNanhai Zhu0Jinlei Liu1School of Civil and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaSchool of Civil and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, ChinaTo realize the static and dynamic multiobjective topology optimization of joints in spatial structures, structural topology optimization is carried out to maximize the stiffness under static multiload conditions and maximize the first third-order dynamic natural frequencies. According to the single-objective optimization results, the objective function of the multiobjective topology optimization of joints is established by using the compromise programming method, and the weight coefficient of each static load condition is determined by using the analytic hierarchy process. Subsequently, under the constraint of the volume fraction, the multiobjective topology optimization of joints is realized by minimizing the multiobjective function. Finally, the optimized structure is smoothed to obtain a smoother joint, and its mechanical properties are compared with those of the hollow ball joint. The results indicate that the multiobjective topology optimization that considers the static stiffness and dynamic frequency can effectively improve the mechanical properties of the structure. Through the research on multiobjective topology optimization, a new type of spatial joint with reasonable stress, a novel form, and aesthetic shape can be obtained, which mitigates the shortcomings of single-objective topology optimization. In comparison to hollow spherical joints with the same weight, topology-optimized joints have a superior ability to resist deformation and improve low-order frequency, which verifies the feasibility of applying multiobjective topology optimization to the lightweight design of joints.http://dx.doi.org/10.1155/2021/5530644 |
| spellingShingle | Nanhai Zhu Jinlei Liu Multiobjective Topology Optimization of Spatial-Structure Joints Advances in Civil Engineering |
| title | Multiobjective Topology Optimization of Spatial-Structure Joints |
| title_full | Multiobjective Topology Optimization of Spatial-Structure Joints |
| title_fullStr | Multiobjective Topology Optimization of Spatial-Structure Joints |
| title_full_unstemmed | Multiobjective Topology Optimization of Spatial-Structure Joints |
| title_short | Multiobjective Topology Optimization of Spatial-Structure Joints |
| title_sort | multiobjective topology optimization of spatial structure joints |
| url | http://dx.doi.org/10.1155/2021/5530644 |
| work_keys_str_mv | AT nanhaizhu multiobjectivetopologyoptimizationofspatialstructurejoints AT jinleiliu multiobjectivetopologyoptimizationofspatialstructurejoints |