Structural and Multidisciplinary Optimization

, Volume 24, Issue 4, pp 333–337

An evolutionary approach for layout optimization of a three-dimensional truss

  • I.A. Azid
  • A.S.K. Kwan
  • K.N. Seetharamu
Brief note

Abstract.

Layout optimization is defined as the simultaneous optimization of three aspects, i.e. topology, size and geometry. In this paper, a new approach based on evolutionary genetic search is employed to find the optimal design. The proposed approach departs from standard Genetic Algorithms (GA) in that it does not use binary strings in the representation of the possible solutions. The approach is applied to a 2-D benchmark example and a well-known space truss example. This 25-bar-truss is solved by using the proposed approach, with good results. The effect of removing the restriction of area grouping and the free location of joints and supports in the 25-bar truss are also investigated, with and without symmetry. Major drawbacks in finding the optimal solution by using the ground structure approach are overcome in the proposed method.

Key words: layout optimization, genetic algorithm, ground structure, space truss 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • I.A. Azid
    • 1
  • A.S.K. Kwan
    • 2
  • K.N. Seetharamu
    • 1
  1. 1.School of Mechanical Engineering, Universiti Sains Malaysia, Malaysia e-mail: ishakusmpp@yahoo.comMY
  2. 2.Cardiff School of Engineering, University of Wales, Cardiff, UKGB

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