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A design process for complex mechanical structures using property based models, with application to car bodies
Volvo Car Corporation, Göteborg, Sweden.
Volvo Car Corporation, Göteborg, Sweden.
UMIST, Manchester, England.
2002 (English)In: Proceedings of the 7th International Design Conference: DESIGN 2002 / [ed] D. Marjanovic, 2002, 611-620 p.Conference paper, Published paper (Refereed)
Abstract [en]

The design of complex mechanical structures is multi-objective and includes the treatements of a wide range of requirements such as quantitative, qualitative, subjective and objective. An example of this type of structure is a car body, where design has a long tradition from wich valuable experience can be drawn however fixation to old practises has to be avoided. The design process described in the paper aims to reduce lead time while not excluding innovative solutions. By representing all concepts on a common base as a property based model and use optimisation, an objective analysis can be done early thereby only viable concepts will emerge to further selection. The data gained at early phases is used as input to detail design reducing iterations.

Place, publisher, year, edition, pages
2002. 611-620 p.
Keyword [en]
Design method, concept selection, optimisation, structural design, mechanical structures, multi-objective
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-87817OAI: oai:DiVA.org:liu-87817DiVA: diva2:600126
Conference
DESIGN2002 Conference, 14-17 May, Cavtat, Croatia 2002
Available from: 2013-01-23 Created: 2013-01-23 Last updated: 2013-01-23
In thesis
1. Topology optimization of vehicle body structures: method, theory and applications
Open this publication in new window or tab >>Topology optimization of vehicle body structures: method, theory and applications
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation is concerned with topology optimization of vehicle body structures.

The first part of this thesis gives a summary of the research project. A design process for complex mechanical structures is presented. This design process includes an optimization step where simplified models are optimized. These simplified models are frame structures consisting of beams and joints. Joints are modelled as a collection of sub-elements to support for a topological change during optimization. Parameterization of beams and joint is also presented and design variables are introduced.

An application of this frame topology optimization method, concerning a vehicle body structure, is presented.

Two extensions to the theory are also presented. First, the possibility to penalize joints to support for easily realizable results is presented. This is followed by a two-material interpolation that introduces the possibility of using a mixed material structure.

This introductory part is followed by five appended papers produced within the framework of this research.

Abstract [sv]

Denna doktorsavhandling behandlar topologioptimering av fordonskarosser.

Första delen i avhandlingen ger en summering av forskningsprojektet. En produktutvecklingsprocess för komplexa mekaniska system presenteras. Denna process innefattar ett optimeringssteg där förenklade modeller optimeras. Dessa förenklade modeller är modellerade som ramstrukturer baserade på balkar och knutar. Knutarna är modellerade m.h.a. en uppsättning delelement för att möjliggöra en topologisk ändring under optimimeringsprocessen. Även balkars och knutars parameterisering och designvariabler beskrivs i den inledande delen. En tillämpning av topologioptimering får ramar presenteras på en fordonskarossmodell. Två utvecklingar av teorin gås också igenom. Först beskrivs möjligheten att tillämpa knutstraff vilket möjliggör skapandet av mer realiserbara modeller. Detta efterföljs av en tvåmaterialinterpolering vilken introducerar möjligheten att generera strukturer med optimalt materialval. Slutligen identifieras framtida forskning inom området.

Den inledande delen följs sedan av fem artiklar vilka har genererats under projektets gång.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2004. 43 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 885
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-22915 (URN)2270 (Local ID)91-7373-979-0 (ISBN)2270 (Archive number)2270 (OAI)
Public defence
2004-09-09, Sal C3, Hus C, Linköping Universitet, Linköping, 10:15 (Swedish)
Opponent
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2013-01-23

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Fredricson, Harald

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