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Advances in Aircraft and Spacecraft Science
  Volume 2, Number 2, April 2015 , pages 125-168
DOI: https://doi.org/10.12989/aas.2015.2.2.125
 

Phenomenology of nonlinear aeroelastic responses of highly deformable joined wings
Rauno Cavallaro, Andrea Iannelli, Luciano Demasi and Alan M. Razon

 
Abstract
    Dynamic aeroelastic behavior of structurally nonlinear Joined Wings is presented. Three configurations, two characterized by a different location of the joint and one presenting a direct connection between the two wings (SensorCraft-like layout) are investigated. The snap-divergence is studied from a dynamic perspective in order to assess the real response of the configuration. The investigations also focus on the flutter occurrence (critical state) and postcritical phenomena. Limit Cycle Oscillations (LCOs) are observed, possibly followed by a loss of periodicity of the solution as speed is further increased. In some cases, it is also possible to ascertain the presence of period doubling (flip-) bifurcations. Differences between flutter (Hopf
 
Key Words
    joined wings; limit cycle oscillations; aeroelasticity; flutter; bifurcations
 
Address
Rauno Cavallaro: Department of Aerospace Engineering, San Diego State University, 5500 Campanile Dr., San Diego, CA, USA; Department of Structural Engineering, University of California San Diego, 9500 Gilman Dr., La Jolla, CA, USA
Andrea Iannelli: Department of Aerospace Engineering, University of Pisa, via G.Caruso 8, Pisa, Italy
Luciano Demasi and Alan M. Razon: Department of Aerospace Engineering, San Diego State University, 5500 Campanile Dr., San Diego, CA, USA
 

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