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Topology Optimization of Plane Structures with Multiload Case using a Lower order Finite Element  

이상진 (한국원자력연구소)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.16, no.1, 2003 , pp. 59-68 More about this Journal
Abstract
An optimization Program is developed to produce new topologies of plane structures under multiload case. A four-node finite element is used in the response analysis to reduce the computation time and to ultimately achieve practical topology optimization. The bilinear finite element is prone to produce chequer-boarding phenomenon and a simple filtering process is therefore adopted. An artificial material model is employed to represent the structural material and the resizing algorithm based on the optimality criteria is adopted to update the material density parameter during optimization process. With newly developed optimization program, the comparison study has been made between single and multiload cases and its results are described in this paper. From numerical results, it appears that multiload case should be considered to achieve the practical topology optimization.
Keywords
topology optimization; lower order finite element; chequer-boarding; artificial material; optimality criteria; multiload case;
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