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ORIENTATION OPTIMIZATION FOR THE FLUTTER ONSET IN FIBER REINFORCED LAMINATED PLATES USING MAC

Varella, G.; Leon, D. M. De; Fonseca, J. S. O.; Souza, C. E de; Silva, R. G. A. da;

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This work presents an optimization formulation to increase the flutter onset velocity in a composite plate made of glass-epoxy subject to an airflow parallel to its surface. The problem is stated as the maximization of the eigenvalue related to the flutter effects, aiming the improvement in the flutter onset speed. The design variable is the fiber orientation of each ply of the composite plate. The sensitivities are calculated analytically and sequential linear programming is applied. The flutter mode and onset velocity are calculated by the ZAERO software. Mode tracking switching scheme based on the modal assurance criterion (MAC) is used to improve the optimization formulation when a repeated eigenvalue problem has to be handled by the algorithm. Results are presented for many test cases, showing a marked improvement of the simulated flutter behavior.

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Palavras-chave: Structural Optimization, Aeroelasticity, Composite Flat Plates, Modal Assurance Criterion.,

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DOI: 10.5151/meceng-wccm2012-18946

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Como citar:

Varella, G.; Leon, D. M. De; Fonseca, J. S. O.; Souza, C. E de; Silva, R. G. A. da; "ORIENTATION OPTIMIZATION FOR THE FLUTTER ONSET IN FIBER REINFORCED LAMINATED PLATES USING MAC", p. 2652-2667 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18946

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