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Aerospace 2018, 5(1), 3; https://doi.org/10.3390/aerospace5010003

Application of an Efficient Gradient-Based Optimization Strategy for Aircraft Wing Structures

1
School of Mechanical and Aerospace Engineering, Queen’s University Belfast, Belfast BT9 5AH, Northern Ireland, UK
2
Engineering Design Centre, Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK
3
School of Aerospace, Transport and Manufacturing, Cranfield University, Cranfield Mk43 0AL, UK
*
Author to whom correspondence should be addressed.
Received: 8 December 2017 / Revised: 26 December 2017 / Accepted: 2 January 2018 / Published: 4 January 2018
(This article belongs to the Collection Feature Papers in Aerospace)
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Abstract

In this paper, a practical optimization framework and enhanced strategy within an industrial setting are proposed for solving large-scale structural optimization problems in aerospace. The goal is to eliminate the difficulties associated with optimization problems, which are mostly nonlinear with numerous mixed continuous-discrete design variables. Particular emphasis is placed on generating good initial starting points for the search process and in finding a feasible optimum solution or improving the chances of finding a better optimum solution when traditional techniques and methods have failed. The efficiency and reliability of the proposed strategy were demonstrated through the weight optimization of different metallic and composite laminated wingbox structures. The results show the effectiveness of the proposed procedures in finding an optimized solution for high-dimensional search space cases with a given level of accuracy and reasonable computational resources and user efforts. Conclusions are also inferred with regards to the sensitivity of the optimization results obtained with respect to the choice of different starting values for the design variables, as well as different optimization algorithms in the optimization process. View Full-Text
Keywords: structural optimization; gradient-based algorithms; minimum weight; optimum solution structural optimization; gradient-based algorithms; minimum weight; optimum solution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Dababneh, O.; Kipouros, T.; Whidborne, J.F. Application of an Efficient Gradient-Based Optimization Strategy for Aircraft Wing Structures. Aerospace 2018, 5, 3.

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