Aeroelasticity of X-57 like Swept Distributed Propulsion Aircraft Wing

(Courtesy of Image: OpenVSP)

Flutter of Very Thin Plate

Geometric non linearity effect shows a significant effect on the flutter speed of a very thin plate, which helps to increase the bending and torsional stiffness of a very thin plate, resulting in a larger separation between bending and torsion frequencies. Therefore, a higher flutter speed is observed.

(Credit of wind tunnel: Virginia Tech AOE Department)


Jitish Miglani, Wei Zhao, Siddhant Desai, Varakini Sanmugadas, Joseph A. Schetz, and Rakesh K. Kapania. "Analysis, Design, and Experiments of Metal Flat Plate and Foam Airfoil Flutter Test Articles." In AIAA Scitech 2021 Forum, AIAA-2021-1497. 2021. [Link]

Flight Dynamics and Aeroelasticity of Flexible Wing

The coupling of flight dynamics and aeroelasticity of flexible wing resulting in body freedom flutter. Please see more details in:

Schmidt, D., Zhao, W. and Kapania, R. K., “Flight-Dynamics and Flutter Analyses of a Flying-Wing Research Drone – Invited,” AIAA Atmospheric Flight Mechanics Conference, AIAA SciTech 2016, San Diego, CA, AIAA 2016-1748, DOI: 10.2514/6.2016-1748

Zhao, W., Muthirevula, N., Kapania, R. K., Gupta, A., Regan, D. C. and Seiler, P. J., “A Subcomponent-based Finite Element Model Updating for a Composite Flying-wing Aircraft,” AIAA Atmosphere Flight Mechanics Conference, AIAA SciTech, Grapevine, TX, 2017, AIAA-2017-1393, DOI: 10.2514/6.2017-1393


Flight test


Nonlinear Aeroelasticity of Truss-braced Wing

Zhao, W., Kapania, R. K., Schetz, J. A., Coggin, J. M., Allen, T. J. and Sexton, B. W. "Nonlinear Aeroelastic Analysis of SUGAR Truss-braced Wing Wind-tunnel Model Under In-plane Loads,'' 56th AIAA/ASME/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference. AIAA SciTech 2015, Kissimmee, Florida, AIAA 2015-1173, DOI:10.2514/6.2015-1173 

John M. Coggin, Rakesh K. Kapania, Zhao, W., Joseph A. Schetz, V. Hodigere-Siddaramaiah. "Nonlinear Aeroelastic Analysis of a Truss Braced Wing Wind Tunnel Model "55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference, AIAA SciTech 2014, National Harbor, Maryland, AIAA 2014-0335, DOI: 10.2514/6.2014-0335 

Model details of TBW WTM can be found in NASA reports on SUGAR project.

SUGAR TBW WTM Flutter test_Trim.mp4

(Credit: NASA)