Techno Press
Techno Press

Structural Engineering and Mechanics   Volume 27, Number 1, September10 2007, pages 49-61
DOI: http://dx.doi.org/10.12989/sem.2007.27.1.049
 
Numerical stability and parameters study of an improved bi-directional evolutionary structural optimization method
X. Huang and Y. M. Xie

 
Abstract     [Full Text]
    This paper presents a modified and improved bi-directional evolutionary structural optimization (BESO) method for topology optimization. A sensitivity filter which has been used in other optimization methods is introduced into BESO so that the design solutions become mesh-independent. To improve the convergence of the optimization process, the sensitivity number considers its historical information. Numerical examples show the effectiveness of the modified BESO method in obtaining convergent and mesh-independent solutions. A study of the effects of various BESO parameters on the solution is then conducted to determine the appropriate values for these parameters.
 
Key Words
    bi-directional evolutionary structural optimization (BESO); numerical stability; mesh-independency; parameters study.ore; SPM; random sea; reliability; fatigue; compliant.
 
Address
X. Huang and Y. M. Xie: School of Civil and Chemical Engineering, RMIT University, GPO Box 2476V, Melbourne 3001, Australia
 

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