Optimum Design of Stiffened Shear Panels
Awie ViljoenA.G.VisserAlbert A.Groenwold
Division of Manufacturing and Materials Technology CSIR,Pretoria,0001,South AfricaDepartment of Mechanical Engineering University of Pretoria,Pretoria,0002,South Africa
摘要：<正>The optimal design of buckled and stiffened shear panels in aircraft structures is addressed using a genetic algorithm. The post-buckling behavior of the panels is assessed using the iterative algorithm suggested by Grisham. This method requires only linear finite element analyses, while convergence is typically obtained in as little as 5 stiffness matrix evaluations. The Grisham algorithm is extensively compared with empirical design methods previously used in aircraft structures, and also a refined, non-linear quasi-static finite element analysis. The Grisham algorithm provides for both compressive and shear buckling, and overcomes many a conservatism inherent to conventional methods of analysis. In addition, the method is notably less expensive than non-linear finite element analyses, even though global collapse cannot be predicted.
The Fourth World Congress of Structural and Multidisciplinary Optimization