Nonlinear Aeroelastic Simulations and Stability Analysis of the Pazy Wing Aeroelastic Benchmark

The Pazy wing aeroelastic benchmark is a highly flexible wind tunnel model investigated in the Large Deflection Working Group as part of Third Aeroelastic Prediction Workshop. Due to design model, very large elastic deformations order 50% span are generated at highest dynamic pressures and angles attack tunnel. This paper presents static coupling simulations stability analyses for selected onflow velocities attack. Therefore, an solver developed German Aerospace Center (DLR) used simulations, which couples vortex lattice method with commercial finite element MSC Nastran. For analysis, linearised aerodynamic derived analytically from unsteady integrated modal structural into monolithic discrete-time state-space model. then determined by calculating eigenvalues system’s dynamics matrix. It shown that terms flutter changes significantly increasing deflection heavily influenced change properties, i.e., eigenvectors.