A Two-Level Procedure for the Global Optimum Design of Composite Modular Structures-Application to the Design of an Aircraft Wing: Part 2: Numerical Aspects and Examples

摘要

This work concerns a two-level procedure for the global optimum design of composite modular structures.The case-study considered is the least weight design of a stiffened wing-box for an aircraft structure.The method is based on the use of the polar formalism and on a genetic algorithm.In the first level of the procedure, the optimal structure is designed as composed by a single equivalent layer, while a laminate realizing the optimal structure is found in the second level.The method is able to automatically find the optimal number of modules;no simplifying assumptions are used and it can be easily generalized to other problems.The work is divided into two parts: the theoretical formulation in the first part, the genetic procedure and some numerical examples in this second one.