Computational Technology Resources - CCC

Y. Li¹, T. Gao¹, Q.Y. Zhou², P. Chen², D.Z. Yin³ and W.H. Zhang¹

¹State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xi’an, China
²Beijing Aerospace Technology Institute, Beijing, China
³Beijing Institute of Long March Space Vehicle, Beijing, China

doi:10.4203/ccc.3.5.1

Y. Li, T. Gao, Q.Y. Zhou, P. Chen, D.Z. Yin, W.H. Zhang, "A Novel Design Approach of Thin-Walled Structures with Lattices and Stiffeners based on Multi-Material Topology Optimization", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 5.1, 2022, doi:10.4203/ccc.3.5.1

Keywords: layout design; thin-walled structures; topology optimization; lattice; stiffener; multi-material.

Abstract

In this paper, a novel layout design approach of thin-walled structures with lattices and stiffeners based on the multi-materials topology optimization method is proposed. The main idea of this approach is as follows. The chosen lattice unit cells are equivalent to the virtual homogeneous materials, and then the optimal material layout of virtual homogeneous materials and solid material is found by employing the multi-material topology optimization method. This detailed design process is demonstrated as follows. First, depending on the design requirements, several typical lattice cells are selected. The energy-based homogenization method is employed to achieve the effective elastic matrix of the typical lattice unit cells. Second, the mathematical model of layout optimization of thin-walled structures with lattices and stiffeners under mass constraint is established, and the sensitivity analysis of the structural compliance is derived based on the adjoint method. The optimization model is solved by the optimization algorithm. This paper takes the panel structure of spacecraft as an example to demonstrate the specific process of design and analysis. In the example, three layouts, i.e. the stiffened panel structure, the lattice sandwich structure and the panel structure with lattices and stiffeners are obtained and compared. The simulation results from three different structures are quite encouraging since the panel structure with lattices and stiffeners obtained by the proposed method shows improved mechanical properties compared to other designs.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 3 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: B.H.V. Topping and J. Kruis Paper 5.1 A Novel Design Approach of Thin-Walled Structures with Lattices and Stiffeners based on Multi-Material Topology Optimization Y. Li¹, T. Gao¹, Q.Y. Zhou², P. Chen², D.Z. Yin³ and W.H. Zhang¹ ¹State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xi’an, China ²Beijing Aerospace Technology Institute, Beijing, China ³Beijing Institute of Long March Space Vehicle, Beijing, China doi:10.4203/ccc.3.5.1 Full Bibliographic Reference for this paper Y. Li, T. Gao, Q.Y. Zhou, P. Chen, D.Z. Yin, W.H. Zhang, "A Novel Design Approach of Thin-Walled Structures with Lattices and Stiffeners based on Multi-Material Topology Optimization", in B.H.V. Topping, J. Kruis, (Editors), "Proceedings of the Fourteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 3, Paper 5.1, 2022, doi:10.4203/ccc.3.5.1 Keywords: layout design; thin-walled structures; topology optimization; lattice; stiffener; multi-material. Abstract In this paper, a novel layout design approach of thin-walled structures with lattices and stiffeners based on the multi-materials topology optimization method is proposed. The main idea of this approach is as follows. The chosen lattice unit cells are equivalent to the virtual homogeneous materials, and then the optimal material layout of virtual homogeneous materials and solid material is found by employing the multi-material topology optimization method. This detailed design process is demonstrated as follows. First, depending on the design requirements, several typical lattice cells are selected. The energy-based homogenization method is employed to achieve the effective elastic matrix of the typical lattice unit cells. Second, the mathematical model of layout optimization of thin-walled structures with lattices and stiffeners under mass constraint is established, and the sensitivity analysis of the structural compliance is derived based on the adjoint method. The optimization model is solved by the optimization algorithm. This paper takes the panel structure of spacecraft as an example to demonstrate the specific process of design and analysis. In the example, three layouts, i.e. the stiffened panel structure, the lattice sandwich structure and the panel structure with lattices and stiffeners are obtained and compared. The simulation results from three different structures are quite encouraging since the panel structure with lattices and stiffeners obtained by the proposed method shows improved mechanical properties compared to other designs. download the full-text of this paper (PDF, 7 pages, 338 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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