A Systems Approach To Shape And Topology
Optimisation Of Mechanical Structures
Author(s)
K. Fiedler, B. F. Rolfe, A. Asgari & T. de Souza
Abstract
Optimisation techniques have become more and more important as the possibility
of simulating complex mechanical structures has become a reality. A common tool
in the layout design of structural parts is the topology optimisation method, which
finds an optimum material distribution within a given geometrical design space to
best meet loading conditions and constraints.
Another important method is shape optimisation, which optimises weight given
parametric geometric constraints. In the case of complex shaped parts or elaborate
assemblies, for example automobile body structures, shape optimisation is still
hard to do; mainly due to the difficulty in translating shape design parameters
into meaningful analysis models. Tools like the parametric geometry package SFE
CONCEPT are designed to mitigate these issues.
Nevertheless, shape methods usually cannot suggest new load path
configurations, while topology methods are often confined to single parts. To
overcome these limitations the authors have developed a method that combines
both approaches into an Integral Shape/Topology Method (IST) that is capable of
finding new optimal solutions.
This is achieved by an automated optimisation loop and can be applied for both
thin walled structures as well as solid 3D geometries. When optimising structures
by applying IST, global optimum solutions can be determined that may not be
obtained with isolated shape- or topology-optimisation methods.
Keywords: topology optimisation, shape optimisation, simultaneous shape and
topology optimisation, structural optimisation, IST.
Keywords
topology optimisation, shape optimisation, simultaneous shape andtopology optimisation, structural optimisation, IST.
Related Book
Other papers in this volume
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