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Optimization study of frame components for a truck
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis work considers the conceptual design of a mounting structure and two cross beams. The structure is intended to be placed on the frame of a truck and will be subjected to a standard set of load cases originating from vehicle maneuvering. This thesis work will also investigate how the optimization process can be included in the design process of heavy vehicles and how concepts can be generated for multiple configurations.The conceptual design was generated by first applying rough topology optimizations for each of the load cases, followed by topology optimization on combined load cases for each configuration and finally topology optimization with multiple configurations. Since the model was quite large, a static condensation was performed to investigate if the computations could be speeded up. A reference model was built with existing designs to study the responses and to compare the static analysis in the validation. For the process of minimizing mass, compliance responses were extracted from reference computations to use in the topology optimization.The optimization produced reasonable concepts for single and multiple configurations. However, more investigations should be done on the constraints of the two optimization problems that were set up. The reduced model showed a reduction in solution time of 60 % for multiple load cases and 81.5 % in storage size, which implies that the static condensation should be used when possible to save time when many iterations are to be expected.The concepts found can be further developed with fine tuning optimizations, such as size optimizations and shape optimizations. More concepts can also be generated by changing the constraints on the design variables or by increasing or decreasing the compliance constraints for the different subcases.

Place, publisher, year, edition, pages
2018. , p. 74
Series
TRITA-SCI-GRU ; 436
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-252768OAI: oai:DiVA.org:kth-252768DiVA, id: diva2:1321152
Subject / course
Solid Mechanics
Supervisors
Examiners
Available from: 2019-06-07 Created: 2019-06-07 Last updated: 2019-06-07Bibliographically approved

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Citation style
  • apa
  • harvard1
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  • vancouver
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • asciidoc
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