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Nytt fjäderkoncept för babysitter: progressiv styvhet genom icke-linjärt material
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
New spring concept for babysitter: progressive stiffness through non-linear material (English)
Abstract [sv]

I denna rapport användes beräkningsverktyget ANSYS tillsammans med stöd av experiment på prototyper för att ta fram ett nytt gungningskoncept till företaget BabyBjörns babysitter. Utmaningen låg i att försöka uppnå ett progressivt styvhetsbeteende hos konstruktionen och därmed minska gungningsfrekvenserna för större barn men samtidigt bevara gungningsfrekvenserna för mindre barn. Analysen skedde primärt i två steg. Först analyserades den befintliga konstruktionen, svagheter och styrkor identifierades samt utvecklingsmöjligheter. Efter detta togs en ny lösning fram, där gummimaterial utnyttjades för att uppnå ett progressivt styvhetsbeteende, vilket inte lyckades uppnås hos den befintliga konstruktionen.

 

Abstract [en]

In this report, the calculation tool ANSYS was used together with the support of experiments on prototypes to develop a new swinging concept for BabyBjörns babysitter. The challenge was to get a progressive stiffness behavior from the construction and thereby reducing the swinging frequencies for larger children while maintaining the swing rates for smaller children. The analysis took place primarily in two stages. First, the existing construction was analysed, weaknesses and strengths were identified, as well as development opportunities. After this, a new solution was developed. The concept used in the already existing construction does not succeed in obtaining a progressive stiffness behavior within reasonable modifications. Although, the proposed solution can with the help of hyperelastic materials achieve the desired stiffness.

Place, publisher, year, edition, pages
2019.
Series
TRITA-SCI-GRU ; 2019:266
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-257781OAI: oai:DiVA.org:kth-257781DiVA, id: diva2:1348449
External cooperation
BabyBjörn AB
Supervisors
Examiners
Available from: 2019-09-04 Created: 2019-09-04 Last updated: 2019-09-04Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • nn-NB
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  • Other locale
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