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H. Lohse-Busch¹, C. Hühne¹, D. Liu², V.V. Toropov^2,3 and U. Armani²

¹Department Composite Design, Institute of Composite Structures and Adaptive Systems
German Aerospace Center (DLR), Braunschweig, Germany
²School of Civil Engineering, University of Leeds, United Kingdom
³School of Mechanical Engineering, University of Leeds, United Kingdom

Keywords: composite structure, anisogrid design, finite element simulation, genetic programming, metamodel.

Summary

In the EU FP7 collaborative research programme ALaSCA (Advanced Lattice Structures for Composite Airframes), the novel design of an anisogrid composite fuselage section has been optimized using topology optimization with respect to weight and structural performance. According to the concept of an extended uniform LATIN hypercube design of numerical experiments (DOE), a 101-point DOE has been developed. Each data point represents a set of the geometric fuselage barrel parameters, which are simulated using finite element (FE) method. Using these training data sets, the global metamodels have been built as explicit expressions of the design parameters using genetic programming (GP). This was followed by the parametric optimization of the fuselage barrel by genetic algorithm (GA) to obtain the best design configuration in terms of weight savings subject to stability, strength and strain requirements. The optimal solution has been verified using the finite element simulation of the lattice fuselage barrel and the true structural responses have been compared to those provided by the metamodels. It is concluded that the use of the global metamodel-based approach has enabled the solution of this optimization problem with sufficient accuracy as well as provided the designers with a wealth of information on the structural behaviour of the novel anisogrid design of a composite fuselage.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 230 Parametric Optimization of a Lattice Aircraft Fuselage Barrel Using Metamodels Built with Genetic Programming H. Lohse-Busch¹, C. Hühne¹, D. Liu², V.V. Toropov^2,3 and U. Armani² ¹Department Composite Design, Institute of Composite Structures and Adaptive Systems German Aerospace Center (DLR), Braunschweig, Germany ²School of Civil Engineering, University of Leeds, United Kingdom ³School of Mechanical Engineering, University of Leeds, United Kingdom doi:10.4203/ccp.102.230 purchase the full-text of this paper Full Bibliographic Reference for this paper , "Parametric Optimization of a Lattice Aircraft Fuselage Barrel Using Metamodels Built with Genetic Programming", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 230, 2013. doi:10.4203/ccp.102.230 Keywords: composite structure, anisogrid design, finite element simulation, genetic programming, metamodel. Summary In the EU FP7 collaborative research programme ALaSCA (Advanced Lattice Structures for Composite Airframes), the novel design of an anisogrid composite fuselage section has been optimized using topology optimization with respect to weight and structural performance. According to the concept of an extended uniform LATIN hypercube design of numerical experiments (DOE), a 101-point DOE has been developed. Each data point represents a set of the geometric fuselage barrel parameters, which are simulated using finite element (FE) method. Using these training data sets, the global metamodels have been built as explicit expressions of the design parameters using genetic programming (GP). This was followed by the parametric optimization of the fuselage barrel by genetic algorithm (GA) to obtain the best design configuration in terms of weight savings subject to stability, strength and strain requirements. The optimal solution has been verified using the finite element simulation of the lattice fuselage barrel and the true structural responses have been compared to those provided by the metamodels. It is concluded that the use of the global metamodel-based approach has enabled the solution of this optimization problem with sufficient accuracy as well as provided the designers with a wealth of information on the structural behaviour of the novel anisogrid design of a composite fuselage. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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