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D. Weinberg¹ and N.H. Kim^1,2

¹Nastran Simulation and Generative Design Autodesk, Inc., WA, USA
²Dept. of Mechanical and Aerospace Engineering University of Florida, Florida, USA

doi:10.4203/ccc.3.5.3

D. Weinberg, N.H. Kim, "Next Steps in Generative Design: Optimization of Thin-Walled Structures", 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 5.3, 2022, doi:10.4203/ccc.3.5.3

Keywords: topology optimization, shell, thickness, sensitivity.

Abstract

In this paper, a new methodology of extending a topology optimization engine to solving shell thickness optimization. By utilizing a simple variable conversion, it is shown that the shell thickness design variables can be treated as topology density variables. The shell thickness can vary by individual elements (variable shell element thickness, VSET) or by a group of elements with the same property (variable shell property thickness, VSPT). It is also shown that VSPT can be combined with the traditional topology optimization such that the topology and thickness can vary simultaneously. The major difference from the conventional topology density variables comes from sensitivity calculation, where the bending and membrane stiffnesses have to be differentiated separately. Numerical examples show that the proposed method can provide a better design than the one with topology-only variables and thickness-only variables.

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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 5.3 Next Steps in Generative Design: Optimization of Thin-Walled Structures D. Weinberg¹ and N.H. Kim^1,2 ¹Nastran Simulation and Generative Design Autodesk, Inc., WA, USA ²Dept. of Mechanical and Aerospace Engineering University of Florida, Florida, USA doi:10.4203/ccc.3.5.3 Full Bibliographic Reference for this paper D. Weinberg, N.H. Kim, "Next Steps in Generative Design: Optimization of Thin-Walled Structures", 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 5.3, 2022, doi:10.4203/ccc.3.5.3 Keywords: topology optimization, shell, thickness, sensitivity. Abstract In this paper, a new methodology of extending a topology optimization engine to solving shell thickness optimization. By utilizing a simple variable conversion, it is shown that the shell thickness design variables can be treated as topology density variables. The shell thickness can vary by individual elements (variable shell element thickness, VSET) or by a group of elements with the same property (variable shell property thickness, VSPT). It is also shown that VSPT can be combined with the traditional topology optimization such that the topology and thickness can vary simultaneously. The major difference from the conventional topology density variables comes from sensitivity calculation, where the bending and membrane stiffnesses have to be differentiated separately. Numerical examples show that the proposed method can provide a better design than the one with topology-only variables and thickness-only variables. download the full-text of this paper (PDF, 5 pages, 329 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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