Multidisciplinary Code Coupling for Analysis and Optimization of Aeroelastic Systems

Melike Nikbay, Levent Öncü, Ahmet Aysan (Istanbul Technical University)

This paper presents a practical methodology for static aeroelastic analysis and aeroelastic optimization via coupling of high-?delity commercial codes. A ?nite-volume-based ?ow solver FLUENT is used to solve three dimensional Euler equations, Gambit is used to generate mesh in the ?uid domain, and CATIA is used to model parametric solid geometry. Abaqus, a structural ?nite element method solver, is used to compute the structural response of the aeroelastic system. The mesh-based parallel-code coupling interface MpCCI is used to exchange the pressure and displacement information between FLUENT and Abaqus to perform a loosely coupled aeroelastic analysis by a staggered algorithm, and modeFRONTIER software is used as the optimization driver for scheduling a non-dominated sorting genetic algorithm initiated with design of experiments. First, an AGARD 445.6 wing con?guration is optimized with objectives of maximum lift/drag ratio and minimum weight. Optimization variables are chosen as sweep angle at the quarter-chord and the taper ratio of the wing. Second, a more realistic wing model, ARW-2, is optimized for thickness values of the inner ribs and spars.Aeroelastic analysis produce consistent results with experimental data, and the applied optimization methodology results in Pareto-optimal solutions.