Abstract
Multidisciplinary design optimization technology which can predict the lightest gauge and material grades combination of body components while maintaining stiffness, crashworthiness and other performance attributes has a potential to pursue optimal design of structure. However it is difficult to maintain calculation accuracy of approximation model of the analysis technology for non-linear phenomena such as collision. In this paper, improvement of data sampling method and approximation model from the view point of material deformation were descrived. And design optimization process for body structure subiected to stiffness. NVH and crashworthiness has been established.
