The present paper aims to reveal the significance of rigid-body motions for the flutter mechanism of a span-morphing wing model. The inclusion of rigid-body motions into aeroelastic formulation and flutter analysis is presented. A state-space aeroelastic equation combining the dynamics of stepped Euler-Bernoulli beam with unsteady strip aerodynamic theory is developed by quasi-static modeling. Using a numerical example, variations of flutter mechanism from the bending-torsional flutter to the body-freedom flutter are observed as the span increases. In addition, effects of some dimensionless parameters on the variations of flutter mechanism are investigated. The investigated parameters belonging to the fuselage have limited influences on the bending-torsional flutter but a significant impact on the body-freedom flutter. Keywords: Aeroelasticity, Aircraft design, Body-freedom flutter, Dynamic modeling, Flutter, Rigid body modes, Span-morphing

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dynamics of stepped eulerbernoulli beam fuselage dynamic modeling flutter rigid body modes spanmorphing bendingtorsional flutter rigidbody motions statespace aeroelastic equation bodyfreedom flutter keywords aeroelasticity aircraft design bodyfreedom unsteady strip aerodynamic theory spanmorphing wing

Chao HUANG,Chao YANG,Zhigang WU,Changhong TANG,.Variations of flutter mechanism of a span-morphing wing involving rigid-body motions. 31 (3),.

Chao HUANG,Chao YANG,Zhigang WU,Changhong TANG,"Variations of flutter mechanism of a span-morphing wing involving rigid-body motions" 31

Chao HUANG,Chao YANG,Zhigang WU,Changhong TANG,"Variations of flutter mechanism of a span-morphing wing involving rigid-body motions"