Nonlinear aeroelastic modeling workflow using Simcenter Nastran ifasd2024 Tracking Number 21Presentation: Session: Aeroelastic workflows Room: Room 1.4/1.5 Session start: 09:40 Tue 18 Jun 2024 Emre Ongut emre.ongut@siemens.com Affifliation: Siemens Digital Industries Software Maria Francesca Illiano mariafrancesca.illiano@outlook.it Affifliation: Leonardo Helicopters Topics: - Steady/Unsteady Aerodynamics (High and low fidelity (un)coupled analysis methods:), - Computational Aeroelasticity (High and low fidelity (un)coupled analysis methods:), - Highly Flexible Aircraft Structures (High and low fidelity (un)coupled analysis methods:) Abstract: An aeroelastic analysis workflow for modelling and simulation of very flexible wings using Simcenter Nastran is demonstrated. The workflow establishes file-based data exchange between Nastran nonlinear structural and the aeroelastic solvers for static and flutter analysis. For the static analysis, first, wing twist information is extracted from nonlinear structural solution and included in the Nastran aeroelastic analyses with DMI W2GJ cards. Subsequently, aerodynamic loads are applied to the nonlinear model as follower forces using Nastran FORCE2 cards. For the flutter analysis workflow, static results are linearized using pre-stressed normal modes and used in usual flutter analysis routines. The workflow is automated with the help of an NX Open script, minimizing the user intervention. The workflow is applied to PAZY wing model of Technion and validated against computational and experimental data for static aeroelastic and flutter cases. |