TY - JOUR
T1 - Representation and analysis of control surface freeplay nonlinearity
AU - Vasconcellos, R.
AU - Abdelkefi, A.
AU - Marques, F. D.
AU - Hajj, M. R.
PY - 2012/5
Y1 - 2012/5
N2 - 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.
AB - 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.
KW - Aeroelasticity
KW - Control surface
KW - Duhamel formulation
KW - Experimental identification
KW - Freeplay nonlinearity
KW - Poincaré section
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U2 - 10.1016/j.jfluidstructs.2012.02.003
DO - 10.1016/j.jfluidstructs.2012.02.003
M3 - Article
AN - SCOPUS:84861196566
SN - 0889-9746
VL - 31
SP - 79
EP - 91
JO - Journal of Fluids and Structures
JF - Journal of Fluids and Structures
ER -