Considerable attention has been given in recent years to the design of highly flexible aircraft. The results of numerous studies demonstrate the significant performance benefits of strut-braced wing (SBW) and trussbraced wing (TBW) configurations. Critical aspects of the TBW configuration are its larger aspect ratio, wing span and thinner wings. These aspects increase the importance of considering fluid/structure and control system coupling. This paper presents high-fidelity Navier-Stokes simulations of the dynamic response of the flexible Boeing Subsonic Ultra Green Aircraft Research (SUGAR) truss-braced wing wind-tunnel model. The latest version of the SUGAR TBW finite element model (FEM), v.20, is used in the present simulations. Limit cycle oscillations (LCOs) of the TBW wing/strut/nacelle are simulated at angle-of-attack (AoA) values of -1, 0 and +1 degree. The modal data derived from nonlinear static aeroelastic MSC.Nastran solutions are used at AoAs of -1 and +1 degrees. The LCO amplitude is observed to be dependent on AoA. LCO amplitudes at -1 degree are larger than those at +1 degree. The LCO amplitude at zero degrees is larger than either -1 or +1 degrees. These results correlate well with both wind-tunnel data and the behavior observed in previous studies using linear aerodynamics. The LCO onset at zero degrees AoA has also been computed using unloaded v.20 FEM modes. While the v.20 model increases the dynamic pressure at which LCO onset is observed, it is found that the LCO onset at and above Mach 0.82 is much different than that produced by an earlier version of the FEM, v. 19.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Aeroelastic Analysis of SUGAR Truss-Braced Wing Wind-Tunnel Model Using FUN3D and a Nonlinear Structural Model


    Contributors:
    R. E. Bartels (author) / R. C. Scott (author) / T. J. Allen (author) / B. W. Sexton (author)

    Publication date :

    2015


    Size :

    15 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Aeroelastic Analysis of SUGAR Truss-Braced Wing Wind-Tunnel Model Using FUN3D and a Nonlinear Structural Model

    Bartels, Robert E. / Scott, Robert C. / Allen, Timothy et al. | AIAA | 2015


    Aeroelastic Analysis of SUGAR Truss-Braced Wing Wind-Tunnel Model Using FUN3D and a Nonlinear Structural Model

    Bartels, Robert E. / Scott, Robert C. / Allen, Timothy J. et al. | NTRS | 2015


    Aeroelastic Analysis of SUGAR Truss-Braced Wing Wind-Tunnel Model Using FUN3D and a Nonlinear Structural Model (AIAA 2015-1174)

    Bartels, Robert E. / Scott, Robert C. / Allen, Timothy et al. | British Library Conference Proceedings | 2015



    Boeing SUGAR Truss-Braced Wing Aircraft: Wind-Tunnel Data and Aeroelastic Analyses

    R. Bartels / R. Scott / T. J. Allen et al. | NTIS | 2015