09:40   Aeroelastic workflows Chair: Eric GARRIGUES 09:40 30 mins Nonlinear aeroelastic modeling workflow using Simcenter Nastran Emre Ongut, Maria Francesca Illiano 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. 10:10 30 mins Towards modular aeroelastic simulations : recent developments and applications at ONERA Antoine Placzek, Antoine Riols-Fonclare, Alain Dugeai, Cédric Liauzun, Christophe Blondeau, Pierre-Emmanuel Des Boscs, Charly Mollet Abstract: This paper details current work carried out at ONERA for the development of a modular framework dedicated to the resolution of aeroelastic problems. Historically, an aeroelastic module was implemented inside ONERA’s CFD code elsA, that includes all the necessary components to perform aeroelastic analyses (mesh deformation methods, transfer of loads and displacements, specific simulations drivers). Aeroelastic simulations capabilities within this elsA’s legacy aeroelastic module are however restricted mainly to the coupling with linear elastic structures and multiblock structured aerodynamic grids, as elsA was initially developed for structured meshes. To upgrade the aeroelastic coupling capabilities, some developments have been performed to externalize the different components outside elsA’s kernel. This modular approach offers greater flexibility in terms of coupling and also makes it possible to work not only with elsA but also with other CFD codes, while reusing the same components for coupling. Some recent applications performed in this context will be presented in this paper and some perspectives for the development of advanced modular solvers are finally presented.

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