In the paper the optimal design for the maximum buckling load of isotropic/orthotropic stiffened plates subject to weight limitation is shown. The parametric model of the analyzed structures was characterized by an arbitrary cross-section layout with both topologic and geometric design variables. In order to increase the computational efficiency of the optimization task, a semi-analytical approach for the determination of eigenvalues and eigenvectors was adopted. The optimization procedure was based on a specific bit-masking oriented genetic algorithm (BMOGA), able to handle in parallel dedicated genetic operators for discrete and integer design variables. The optimization of a simply supported plate with a topologically-free grid-shaped cross-section is finally described and discussed in detail as a preliminary validation test of both structural calculus engine and genetic procedure.
Buckling optimization of grid structures via genetic algorithms
IUSPA, Luigi;MINUTOLO, Vincenzo;RUOCCO, Eugenio
2006
Abstract
In the paper the optimal design for the maximum buckling load of isotropic/orthotropic stiffened plates subject to weight limitation is shown. The parametric model of the analyzed structures was characterized by an arbitrary cross-section layout with both topologic and geometric design variables. In order to increase the computational efficiency of the optimization task, a semi-analytical approach for the determination of eigenvalues and eigenvectors was adopted. The optimization procedure was based on a specific bit-masking oriented genetic algorithm (BMOGA), able to handle in parallel dedicated genetic operators for discrete and integer design variables. The optimization of a simply supported plate with a topologically-free grid-shaped cross-section is finally described and discussed in detail as a preliminary validation test of both structural calculus engine and genetic procedure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
