Tendances Actuelles de l'Analyse Aeroelastique des Avions Militaires (Trends in Aeroelastic Analysis of Combat Aircraft),
AVIONS MARCEL DASSAULT-BREGUET AVIATION SAINT-CLOUD (FRANCE)
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After recalling the general principles of aeroelastic coupling with structural finite element analysis, we explain the simplifying assumptions of static aeroelasticity. Then we describe the technique of load basis reduction used in the branch CHARGE of ELFINI, the general aircraft structure analysis program of AMD-BA. This technique allows us to separate the big expensive computation of F.E. resolutions and theoretical aerodynamic analysis from aeroelastic coupling and flight maneuver computation. We give details about some specific points Mechanical and aerodynamic nonlinear effects in statics and dynamics Optimization and differentiation of flexible aerodynamic derivatives and Model adjustment on flight measurements. It appears that we hold some satisfying solutions to the most of the problems, except those due to aerodynamic transonic nonlinearities.
- Fluid Mechanics