Topology Optimization of a Concept Car Body in the Early Design

Transcription

Topology Optimization of a Concept Car Body
in the Early Design Phase
M.Conic, Dr. A.Hillebrand
Konzernforschung
Volkswagen AG
3rd European HyperWorks Technology Conference (HTC)
Nov. 2-4th 2009 in Ludwigsburg, Germany
Motivation
Methodical approach
Result of optimization
Feedback on topology
Summary
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Motivation…
VW-EcoRacer
Copyright © Volkswagen AG
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Following the Paths of Nature…
The inner bone structure shows the relationship between the loads
and the inner growth of the bone structure (Trabeculae)
within the volume given by its outer skin (periosteum)
Load paths
Trabeculae
There is no growth of the inner structure
(ossifikation) on the places
where no stress given
periosteum
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Method following the Nature I
• Definition of design space
Package-subtraction (e.g. passenger cell, motor, …)
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Definition of design space
(Package-subtraction)
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… outer skin of design space
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Method following the Nature II
• Definition of a group („populating the area“)
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Starting from the outer skin…
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… our design space environment
gets populated…
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Longitudinal section after population…
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Method following the Nature II
• Puting the loads in („environmental conditions“)
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Method following the Nature III
• Puting the loads („environmental conditions“) in
• Topologieoptimization („Specializing“)
e.g. static and dynamic Stiffnesses
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The Optimum, Top View
Torsion und Bending
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Method following the Nature - Feedback
• Puting the loads („environmental conditions“) in
The information/feedback
on the optimal topology
goes back to the structural
design dept.
• Topologieoptimization („Specializing“)
e.g. static and dynamic Stiffnesses
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Summary
Topology optimization of the concept car body in the early concept phase
with Altair-OptiStruct:
Gives precious feedback to structural design,
Supports:
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consequent weight and cost reduction
by efficient use of material,
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the development of low consumption
and low exhaustion car concepts,
Can be used in every further concept phase as well.
Project reference: VW-EcoRacer (2004) …
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VW-EcoRacer
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Topology Optimization of a Concept Car Body in the Early Design

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