Aeroelastic optimization of an aerobatic aircraft wing structure |
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| Institution: | 1. Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI, 48109, USA;2. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA;1. School of Computing and Engineering, University of Huddersfield, Huddersfield, HD1 3DH, United Kingdom;2. School of Mechanical Engineering, Shiraz University, Shiraz 71963-16548, Iran;3. College of Engineering, Swansea University, Swansea, Wales SA2 8PP, United Kingdom;4. Department of Aerospace Engineering, Bristol University, Bristol, BS8 1TR, United Kingdom;1. University of Belgrade, Faculty of Mechanical Engineering, Serbia;2. University of Belgrade, Faculty of Transport and Traffic Engineering, Serbia;3. Innovation Center of the Faculty of Mechanical Engineering, Belgrade, Serbia;1. Department of Aerospace Engineering, Indian Institute of Technology Kanpur, UP 208016, India;2. AURDC, Hindustan Aeronautics Limited, Nasik, MH 422207, India |
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| Abstract: | This paper aims at presenting an investigation into a minimum weight optimal design and aeroelastic tailoring of an aerobatic aircraft wing structure. Firstly, analytical and FE models were created for the original metallic wing and an improved composite wing box structures. In order to validate the numerical models, predicted vibration parameters of the metallic wing box were compared with the experimental results. Comparison was also made for the predicted stress results between the metallic and the composite wing box structures of different dimensions and laminate layups. Secondly, based on a minimum weight composite wing box model of adequate strength the investigation was focused on the aeroelastic tailoring of the wing box by employing the gradient-based deterministic optimization method. The study demonstrates that in addition to a significant weight saving, up to 30% increase of flutter speed for the composite wing box can be achieved by optimizing the fibre orientations of the wing skin and spar web laminates. The optimized laminates are trimmed and reinforced to meet the manufacture and strength requirements with little compromise of flutter speed and a minor weight penalty. |
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