Flutter de painéis: mais um desafio no vôo supersônico

Hélio de Assis Pegado

doi:10.5585/exacta.v4i2.752

Authors

Hélio de Assis Pegado UNINOVE, São Paulo

DOI:

https://doi.org/10.5585/exacta.v4i2.752

Keywords:

Aeroelasticidade. Flutter. Flutter de painéis. Hipersônico. Supersônico.

Abstract

In the present research, it is studied the aeroelastic instability of panels in supersonic fl ow with structural nonlinearity, employing one of the expansions of the perturbations method, known as multiple time scales method. The effect of some elements, such as pre-stress, is investigated. The distinctive equations of large defl ections of a beam and the von Kármán equations for plate theory are used for the problem formulation. The Finite Element Method is applied to solve these equations. The results obtained with the program are presented as limit cycles, and they are discussed and compared to previous investigations

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Author Biography

Hélio de Assis Pegado, UNINOVE, São Paulo

Membros da Associação Brasileira de Ciências Mecânicas, da American Helicopter Society (AHS) e do American Institute of Aeronautics and Astronautics (AIAA); Uninove.