Journal
COMPUTERS & STRUCTURES
Volume 157, Issue -, Pages 142-152Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2015.05.020
Keywords
Topology optimization; Buckling constraints; Pseudo buckling modes; Pseudo mode identification; Two-phase optimization algorithms
Funding
- State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, P.R. China [GZ1305]
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This paper presents a study on topology optimization of continuum structures under buckling constraints. New algorithms are developed for minimization of structural compliance considering constraints on volume and buckling load factors. The SIMP (Solid Isotropic Material with Penalization) material model is employed and nodal relative densities are used as topology design variables. A new approach based on the eigenvalue shift and pseudo mode identification is proposed for eliminating the effect of pseudo buckling modes. Two-phase optimization algorithms are also proposed for achieving better optimized designs. Numerical examples are presented to illustrate the effectiveness of the new methods. (C) 2015 Elsevier Ltd. All rights reserved.
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