A simple checkerboard suppression algorithm for evolutionary structural optimization

Citation
Q. Li et al., A simple checkerboard suppression algorithm for evolutionary structural optimization, ST MULT OPT, 22(3), 2001, pp. 230-239
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
ISSN journal
1615-147X → ACNP
Volume
22
Issue
3
Year of publication
2001
Pages
230 - 239
Database
ISI
SICI code
1615-147X(200110)22:3<230:ASCSAF>2.0.ZU;2-T
Abstract
Checkerboard patterns are quite common in various fixed grid finite element based structural optimization methods. In the evolutionary structural opti mization procedure, such checkerboard patterns have been observed under var ious design criteria. The presence of checkerboard patterns makes the inter pretation of optimal material distribution and subsequent geometric extract ion for manufacturing difficult. To prevent checkerboarding, an effective s moothing algorithm in terms of the surrounding element's reference factors is proposed in this paper. The approach does not alter the mesh of the fini te element model, nor increase the degree of freedom of the structural syst em, therefore, it does not affect the computational efficiency. To demonstr ate the capabilities of this algorithm, a wide range of illustrative exampl es are presented in this paper.