CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Konceptstudie av lastbärande kompositgolv för stadsbuss
KTH, School of Engineering Sciences (SCI).
KTH, School of Engineering Sciences (SCI).
KTH, School of Engineering Sciences (SCI).
KTH, School of Engineering Sciences (SCI).
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Concept study of a load bearing composite floor for city bus (English)
Abstract [sv]

Trenden i fordonsindustrin mot mer bränsleeffektiva fordon kräver att alla komponenter är så lätta som möjligt samtidigt som de möter andra krav som styvhet och hanterbara kostnader. Studiens syfte var att undersöka möjligheten att ersätta mellanchassit i en lågentrébuss från Scania. Mellanchassit som skulle ersättas består av en stålstruktur samt ett innergolv, med syfte att ta upp de laster bussen utsätts för. Detta skulle göras med en sandwichstruktur i komposit, med det huvudsakliga målet att minska vikten med minst 40% och antalet delar med minst 50%. Ersättningsstrukturen krävdes innehava samma styvhets och hållfasthetskrav som dagens struktur uppfyller. Detta åstadkoms genom att två koncept designades, koncept 1 och koncept 2, genom en iterativ FE-analys i ANSYS. Två prototyper byggdes och testades för verkliga laster. Studiens resultat visade att det var möjligt att möte målen för både vikt- och komponentreducering. Koncept 1 och koncept 2 uppnådde en viktminskning på 62% respektive 68% och antalet komponenter reducerades markant. Vidarearbete skulle vara att undersöka infästningarna mellan den nya strukturen och den resterande bussen, modal- och utmattningsanalys, implementering i produktion och ekonomiska aspekter för att nämna några.

Abstract [en]

The current trend in the automotive industry towards more fuel efficient vehicles requires all components to be as light as possible while still meeting other demands such as stiffness and feasible cost. The purpose of this study was to investigate the possibility to replace a partial chassis structure in a Scania low-entry city bus. The partial chassis to be replaced consists of a steel structure and an inner flooring, with the purpose to support loads that the bus is subject to. This was to be done with a composite sandwich structure, with the primary goal to reduce weight by at least 40% and number of components by 50%. The replacement structure needed to meet the stiffness and strength requirements that the current structure fulfils. This was achieved by designing two concepts, concept 1 and concept 2, through an iterative FE-analysis in ANSYS. Two prototypes where built and tested for real world load applications. The result from this study showed that it was possible to meet both the weight and component reduction goal. Concept 1 and concept 2 achieved a weight reduction of 62% and 68% respectively and the number of components was reduced significantly. Further work would be to investigate the interface between the new structure and the rest of the bus, modal- and fatigue analyses, production implementation and economical aspects to name a few.

 

Place, publisher, year, edition, pages
2019.
Series
TRITA-SCI-GRU ; 2019:301
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-255837OAI: oai:DiVA.org:kth-255837DiVA, id: diva2:1342347
External cooperation
Scania AB
Supervisors
Examiners
Available from: 2019-08-13 Created: 2019-08-13 Last updated: 2019-08-13Bibliographically approved

Open Access in DiVA

fulltext(8969 kB)5 downloads
File information
File name FULLTEXT01.pdfFile size 8969 kBChecksum SHA-512
ed1feb2294a652185a0d01cbfe279db429fd59282d1527649f8b3d9096283c53e4101685c02dc49096d42a8a37ab881390a458792e9611232822d3afacff22bb
Type fulltextMimetype application/pdf

By organisation
School of Engineering Sciences (SCI)
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 5 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 63 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf