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