Log In    |    Join IASS    |    Online Journal    |    Proceedings    |    Directory    |    Events    |    News

Online IASS Proceedings

IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Shell Structures

Shape optimization of free-form shells consisting of developable surfaces

< Table of Contents for Shell Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Shell Structures
  • Pages: 6
  • Title: Shape optimization of free-form shells consisting of developable surfaces
  • Author(s): Keigo Nakamura, Makoto Ohsaki, Jinglan Cui
  • Keywords: developable surface, free-form shell, shape optimization, bezier surface
Abstract
A method is presented for optimization of free-form shells consisting of developable surfaces. The surface is modelled as 2ラ1 or 3ラ1 tensor product Bezier surfaces. The developability conditions are assigned numerically as constraints for the optimization problem for minimizing the strain energy under self-weight as the mechanical performance. The control points of the Bezier curves are considered as design variables. A new continuity condition of normal vector of surface is proposed for connecting ruled surfaces. Optimal solutions are found using a nonlinear programming approach, and a finite difference approximation is used for sensitivity analysis. The effectiveness of the present approach is confirmed through various examples and the characteristics of the optimal shapes are discussed.

Read the complete paper (pdf) (requires membership)
© IASS All rights reserved.
IASS · CEDEX - Laboratorio Central de Estructuras y Materiales · C/ Alfonso XII, 3 · 28014 Madrid, Spain     tel. 34 91 335-7409; fax: 335-7422
Site Design & Programming
by World Design Group, Inc.