Virtual flutter testing of next-generation aircraft prototypes

As part of the Aerospace Strategy 2050, the joint goal of achieving sustainable aviation and space technology is pursued. For a sustainable future, ultra-light aircraft structures are required, characterized by high-aspect-ratio wings and optimally distributed propulsion systems. Fundamental research must be conducted on the increased susceptibility to dangerous flutter vibrations in wings with high aspect ratios. Moving beyond traditional linear theories, our focus is on exploring nonlinear behaviors to ensure safe aircraft operation below critical speeds and to accurately predict bounded flutter-induced vibrations. We propose fundamental research into knowledge-driven multi-scale, multiphysics models and intelligent surrogate models derived from detailed simulations or data. These models will support disruptive innovations and offer insights into complex nonlinear dynamics and uncertainties. In collaboration with the Institute of Aerodynamics and the Institute of Aircraft Propulsion at the University of Stuttgart, we are enhancing scientific outcomes by focusing on nonlinear aeroelastic interactions, structural damping, and cutting-edge mitigation technologies like auxetic metamaterials and vibro-impact nonlinear energy sinks to control flutter. Together, we are advancing the development of virtual prototypes and digital twins of aircraft to predictively model aeroelastic properties across their operational lifespan.