TY - JOUR
T1 - Experimental identification of concentrated nonlinearity in aeroelastic system
AU - Abdelkefi, Abdessattar
AU - Vasconcellos, Rui
AU - Hajj, Muhammad R.
AU - Nayfeh, Ali H.
PY - 2012
Y1 - 2012
N2 - Identification of concentrated nonlinearity in the torsional spring of an aeroelastic system is performed. This system consists of a rigid airfoil that is supported by a linear spring in the plunge motion and a nonlinear spring in the pitch motion. Quadratic and cubic nonlinearities in the pitch moment are introduced to model the concentrated nonlinearity. The representation of the aerodynamic loads by the Duhamel formulation yielded accurate values for the flutter speed and frequency. The results show that the use of the Duhamel formulation to represent the aerodynamic loads yields excellent agreement between the experimental data and the numerical predictions.
AB - Identification of concentrated nonlinearity in the torsional spring of an aeroelastic system is performed. This system consists of a rigid airfoil that is supported by a linear spring in the plunge motion and a nonlinear spring in the pitch motion. Quadratic and cubic nonlinearities in the pitch moment are introduced to model the concentrated nonlinearity. The representation of the aerodynamic loads by the Duhamel formulation yielded accurate values for the flutter speed and frequency. The results show that the use of the Duhamel formulation to represent the aerodynamic loads yields excellent agreement between the experimental data and the numerical predictions.
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U2 - 10.1051/matecconf/20120103001
DO - 10.1051/matecconf/20120103001
M3 - Conference article
AN - SCOPUS:84903549445
VL - 1
JO - MATEC Web of Conferences
JF - MATEC Web of Conferences
M1 - 03001
T2 - 1st International Conference on Structural Nonlinear Dynamics and Diagnosis, CSNDD 2012
Y2 - 30 April 2012 through 2 May 2012
ER -