On the Coupling of Aerodynamic and Structural Design

✍ Scribed by Eyal Arian

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 444 KB
• Volume: 135
• Category: Article
• ISSN: 0021-9991
• DOI: 10.1006/jcph.1997.5741

✦ Synopsis

in the Hessian is well conditioned while the aerodynamics part is ill conditioned. It should be emphasized that in this

The symbol of the Hessian for a static aeroelastic optimization model problem is analyzed for the optimization of a plate's shape study the shape of the plate is allowed to change only in and rigidity distribution with respect to a given cost function. The the normal direction (the planform remains fixed). Thereflow is modeled by the small-disturbance full-potential equation fore, no inferences could be made as to the coupling beand the structure is modeled by an isotropic (von Ka ´rma ´n) plate tween the aerodynamic and the structural design when the equation. The cost function consists of both aerodynamic and strucplanform's shape is allowed to change during the optimitural terms. In the new analysis the symbol of the cost function Hessian near the minimum is approximated for the nonsmooth zation.

error components in the shape and rigidity. The result indicates One consequence of this result is that the solution of that the system can be decoupled to two single discipline subminisuch problems can be achieved in two stages. In the first mization problems which will effectively converge to the multidiscistage, the MDO approach should be taken on a coarse plinary optimal solution. The result also indicates that the structure model; that is, the flow and the structure equations are part in the Hessian is well conditioned while the aerodynamic part is ill conditioned. Applications of the result to optimization strategies considered simultaneously during the minimization, which are discussed and demonstrated numerically. ᮊ 1997 Academic Press is a more complex problem than optimizing the decoupled individual disciplines problems. In the second stage, a refined CFD code for the flow and a detailed finite element