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A parallel nodal-based evolutionary structural optimization algorithm

A parallel nodal-based evolutionary structural optimization algorithm
A parallel nodal-based evolutionary structural optimization algorithm
This paper is concerned with the minimum weight design of structures using Finite Element Analysis (FEA). A new evolutionary structural optimization (ESO) algorithm is presented. This method departs from previous studies of ESO in that it exploits the movements of the nodes in an unstructured finite element mesh in an appropriate way. An attractive feature of the scheme presented is that it carries out topology optimization in the interior of the domain concurrently with shape optimization of the exterior of the domain. Circular cavities are inserted into the interior of the domain from which the internal topology is then revealed by migration of the cavity edge nodes. Due to the complexity of the resulting cavity geometry the FE mesh tends to be refined internally. A scheme for maintaining a roughly uniform density unstructured finite element mesh throughout the optimization in a two-dimensional domain is presented. The designs produced posses smooth internal and external boundaries. The method uses iterative finite element analysis and re-meshing to correct for any element distortion. The benchmark "Michell Arch" problem is used to demonstrate the approach.
evolutionary, node, optimization, topology, shape
1615-147X
241-251
Chen, Y.-M.
7746288f-0994-43f2-b7bb-ba67fe491985
Bhaskar, A.
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Keane, A.J.
26d7fa33-5415-4910-89d8-fb3620413def
Chen, Y.-M.
7746288f-0994-43f2-b7bb-ba67fe491985
Bhaskar, A.
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Keane, A.J.
26d7fa33-5415-4910-89d8-fb3620413def

Chen, Y.-M., Bhaskar, A. and Keane, A.J. (2002) A parallel nodal-based evolutionary structural optimization algorithm. Structural and Multidisciplinary Optimization, 23 (3), 241-251. (doi:10.1007/s00158-002-0182-6).

Record type: Article

Abstract

This paper is concerned with the minimum weight design of structures using Finite Element Analysis (FEA). A new evolutionary structural optimization (ESO) algorithm is presented. This method departs from previous studies of ESO in that it exploits the movements of the nodes in an unstructured finite element mesh in an appropriate way. An attractive feature of the scheme presented is that it carries out topology optimization in the interior of the domain concurrently with shape optimization of the exterior of the domain. Circular cavities are inserted into the interior of the domain from which the internal topology is then revealed by migration of the cavity edge nodes. Due to the complexity of the resulting cavity geometry the FE mesh tends to be refined internally. A scheme for maintaining a roughly uniform density unstructured finite element mesh throughout the optimization in a two-dimensional domain is presented. The designs produced posses smooth internal and external boundaries. The method uses iterative finite element analysis and re-meshing to correct for any element distortion. The benchmark "Michell Arch" problem is used to demonstrate the approach.

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Published date: 2002
Keywords: evolutionary, node, optimization, topology, shape

Identifiers

Local EPrints ID: 22068
URI: http://eprints.soton.ac.uk/id/eprint/22068
ISSN: 1615-147X
PURE UUID: c9cb4e93-0832-4749-bdb3-a8c511dbfd03

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Date deposited: 21 Mar 2006
Last modified: 16 Dec 2019 19:24

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Contributors

Author: Y.-M. Chen
Author: A. Bhaskar
Author: A.J. Keane

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