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Advances in Aircraft and Spacecraft Science
  Volume 10, Number 5, September 2023 , pages 419-437

Aeroelastic stability analysis of a two-stage axially deploying telescopic wing with rigid-body motion effects
Sayed Hossein Moravej Barzani and Hossein Shahverdi

    This paper presents the study of the effects of rigid-body motion simultaneously with the presence of the effects of temporal variation due to the existence of morphing speed on the aeroelastic stability of the two-stage telescopic wings, and hence this is the main novelty of this study. To this aim, Euler-Bernoulli beam theory is used to model the bending-torsional dynamics of the wing. The aerodynamic loads on the wing in an incompressible flow regime are determined by using Peters' unsteady aerodynamic model. The governing aeroelastic equations are discretized employing a finite element method based on the beam-rod model. The effects of rigid-body motion on the length-based stability of the wing are determined by checking the eigenvalues of system. The obtained results are compared with those available in the literature, and a good agreement is observed. Furthermore, the effects of different parameters of rigid-body such as the mass, radius of gyration, fuselage center of gravity distance from wing elastic axis on the aeroelastic stability are discussed. It is found that some parameters can cause unpredictable changes in the critical length and frequency. Also, paying attention to the fuselage parameters and how they affect stability is very important and will play a significant role in the design.
Key Words
    aeroelastic stability; morphing aircraft; rigid body motion; two-stage; variable span wing
Sayed Hossein Moravej Barzani and Hossein Shahverdi: Department of Aerospace Engineering, Amirkabir university of Technology, Tehran, Iran

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