Multidisciplinary Optimal Design Concept for Vehicle Body Structural Design

Abstract

This paper describes an integrated structural optimization procedure in the vehicle structural concept design using multilevel decomposition technique. The structural responses in the lower level are represented in terms of local quantities that are the intermediate parameters or the detailed dimensions based on the parametric distributed screen from design and manufacturing constraints. And this technique is applied to develop the aluminum vehicle structure at concept design. We have the very efficiency results that decide the characteristics of master section and joint stiffness of vehicle structure. In the comparison with the base model the bending stiffness and torsional stiffness of the developed aluminum vehicle structure increase around 45% and 35% respectively, and the weight reduction is around 30%.