Representation and analysis of control surface freeplay nonlinearity

Autor(es)

Vasconcellos, R. ^[1] ; Abdelkefi, A. ^[2] ; Marques, F. D. ^[1] ; Hajj, M. R. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Lab Aeroelast, Sao Carlos, SP - Brazil

^[2] Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF FLUIDS AND STRUCTURES; v. 31, p. 79-91, MAY 2012.
• Citações Web of Science: 32

Resumo

Different representations for a control surface freeplay nonlinearity in a three degree of freedom aeroelastic system are assessed. These are the discontinuous, polynomial and hyperbolic tangent representations. The Duhamel formulation is used to model the aerodynamic loads. Assessment of the validity of these representations is performed through comparison with previous experimental observations. The results show that the instability and nonlinear response characteristics are accurately predicted when using the discontinuous and hyperbolic tangent representations. On the other hand, the polynomial representation fails to predict chaotic motions observed in the experiments. (c) 2012 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 07/08459-1 - Análise de séries temporais aeroelásticas não lineares: um estudo experimental
• Beneficiário: Rui Marcos Grombone de Vasconcellos
• Modalidade de apoio: Bolsas no Brasil - Doutorado