By Y. M. Xie, G. P. Steven (auth.)
Evolutionary Structural Optimization (ESO) is a layout strategy in response to the straightforward idea of steadily removal inefficient fabric from a constitution because it is being designed. via this system, the ensuing constitution will evolve in the direction of its optimal form. the newest thoughts and result of ESO are offered right here, illustrated by way of a number of transparent and certain examples. Sections hide the elemental features of the tactic, the applying to a number of load instances and a number of help environments, frequency optimization, stiffness and displacement constraints, buckling, jointed body buildings, form optimization, and rigidity relief. this can be by way of a bit describing Evolve97, a software program package deal with the intention to let readers to attempt the guidelines of ESO themselves and to resolve their optimization difficulties. This software program is equipped on a working laptop or computer diskette which accompanies the book.
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Additional resources for Evolutionary Structural Optimization
1996) Optimization of a Carbon Composite Bicycle Frame. Fourth Year Thesis, Department of Aeronautical Engineering, University of Sydney. , Morgan, K. C. (1987) Adaptive remeshing for compressible flow computations. J Compo Phys. 72, 449-466. , Lund, E. and Birker, T. (1992) Collection of examples: CAOS optimization system, 3rd edition, Special Report No. 13, Institute of Mechanical Engineering, Aalborg University, Denmark. M. M. (1995) Multiple constraint environments for evolutionary structural optimization.
4 shows the initial configuration of a bridge. For a structure such as the bridge the most common loading is a traffic load, which moves from one part of the surface to the other. This continuous moving load can be approximated to a fmite number of load cases. Each of the load cases is applied at a different time but with the same magnitude as the traffic load itself. Load case I case 2 case 3 case 4 case 5 case 6 case 7 case 8 case 9 5M 16M f" i"}'1Nondesign domain Fig. 4. Initial model of a bridge with loading and boundary conditions.
1 is under plane stress conditions. The left hand side of the beam is fixed. A vertical load of 3 kN is applied at the middle of the free end. 001 m. 3 are assumed. 33 mm. 44 Evolutionary Structural Optimization p Fig. 1. Design domain for a short cantilever. -.. .. •• .................... • ... •••• • UC.. • •• •• •• •• ••• •• (b) (a) ...... ........... • •. •••... :-. •• ••• ••• •• •. ••• . ;;. ..... ........... ...... _.... ... ;;;;;;;;;;;;; . :. ::. 2. 00 mm. Stiffuess or Displacement Constraints 45 The design domain is divided into 32 x 20 four node elements.
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