Topology Optimization Using An Adaptive
Genetic Algorithm And A New Geometric
Representation
Author(s)
B. Sid, M. Domaszewski & F. Peyraut
Abstract
A new method for structural topology optimization using a genetic algorithm
is proposed in this paper. This method uses a topology representation by Bézier
curves with varying thickness material distribution in a finite element model.
Two groups of variables are considered: control points of Bézier curves and
thickness values for each curve. This new technique avoids the formation of
disconnected elements and checkerboard patterns in optimal topology design.
New adaptive strategies for crossover and mutation operators are also proposed.
The numerical program has been developed in MATLAB and tested on a
benchmark 2-D problem of topology optimization. The results obtained are
compared with those obtained by the homogenization method and ANSYS code.
Keywords: structural topology optimization, genetic algorithms.
1 Introduction
Structural topology optimization is used to find a preliminary structural
configuration that meets some predefined criteria. An optimal structural topology
can be obtained by the modifications of holes and connectivities of the design
domain. The aim is to redistribute material from within so-called reference
domain in an iterative manner in order to arrive at a structural topology which is
in some criterion optimal. Topology optimization methods have been discussed
in a large number of publications. They are also very attractive for many
industrial applications in the domain of mechanical and civil engineering.
Generally, there are two fundamental approaches to topology optimization.
The first one is based on the deterministic methods where the sensitivity analysis
Keywords
structural topology optimization, genetic algorithms.
Related Book
Other papers in this volume
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