The modal approach, which is normally used in analysis and optimization with dynamic aeroelastic considerations, is extended here to deal with static aeroelastic maneuver trim equations, loads and stresses. Reduced-size static equilibrium equations, where a subset of low-frequency vibration modes of a baseline structure is used as generalized coordinates, are formulated such that they can be used for modified structures with-out changing the coordinates. These expressions, and their derivatives with respect to structural design variables are investigated in comparison with full-size finite-element solutions. A new method, which uses modal stress perturbations of the baseline structure to predict stresses in the modified ones, is developed. The modal-pertubation approach facilitates high-accuracy computations of stress sensitivities without increasing the model size. The presented formulation facilitate an efficient inclusion of stress and loads considerations in on-line aeroservoelastic optimal design schemes.
Stress considerations in reduced-size aeroelastic optimization
Belastungsbetrachtungen bei aeroelastischen Optimierungen im Modellmaßstab
1994
10 Seiten, 11 Bilder, 1 Tabelle, 4 Quellen
Aufsatz (Konferenz)
Englisch
Stress Considerations in Reduced-Size Aeroelastic Optimization
Online Contents | 1995
|Static Aeroelastic Considerations
AIAA | 1996
|