Structural deterioration of curved thin-walled structure and recovery by rib installation: Verification with structural optimization algorithm

摘要

Structural improvements for curved-surface thin-walled structures were examined. In such structures, installations of ribs-support structures for out-of-plane deformations are often effective. These out-of-plane deformations are attributed to internal loadings induced from plane stresses. Shapes of solid curved I-sectional beams models were optimized using a structural optimization algorithm the traction method. Ribbed structures were created semi-automatically by the structural optimization when adequate rib-triggers striped shape constraints or humps in the initial shapes were applied to the models. This result validates the effectiveness of rib installations on curved surface structures. It is notable that the rib formation created substantial topology changes.