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Contemporary vibration isolation: Theory and applications
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0001-5760-3919
2012 (English)In: 19th International Congress on Sound and Vibration 2012, ICSV 2012: Volume 3, 2012, 2012, 2170-2182 p.Conference paper (Refereed)
Abstract [en]

A wave-guide model of transverse, tilting and cross-coupling stiffness for a cylindrical vibration isolator is presented. Clearly, the stiffness depends strongly on frequency while displaying resonances and anti-resonances in the audible frequency range. Convergence studies are carried out, showing that transverse stiffness calculation requires a small number of modes while the corresponding tilting and cross-coupling stiffness calculations require an increased number of modes for sufficient accuracy. The transfer stiffness of a truck cabin suspension is experimentally and theoretically investigated, concluding that the damper mass and the stiffness of the rubber bushing at the end of the damper are important while the characteristic of the damper element may be ignored in the audible frequency range. Novel smart, magneto-sensitive elastomers are a group of materials that rapidly and reversibly can alter their properties when exposed to a magnetic field. The effectiveness of magneto-sensitive vibration isolation system is experimentally investigated by measuring the energy flow into the foundation. The results are promising while showing their advantages compared to traditional vibration isolators. Finally, modeling of magneto-sensitive isolators is discussed including preload, frequency and vibration amplitude dependence. The model results are compared to those of measurements showing good agreement. The models presented and measurements methods applied in this paper are providing increased opportunities to meet sound and vibration design criteria of future products and systems.

Place, publisher, year, edition, pages
2012. 2170-2182 p.
Keyword [en]
Audible frequency range, Cylindrical vibrations, Magneto-sensitive elastomers, Stiffness calculations, Transverse stiffness, Vibration amplitude, Vibration isolation systems, Vibration isolations
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-82523ScopusID: 2-s2.0-84876208547ISBN: 978-162276465-5OAI: diva2:498317
19th International Congress on Sound and Vibration 2012, ICSV 2012; Vilnius; Lithuania; 8 July 2012 through 12 July 2012
TrenOp, Transport Research Environment with Novel Perspectives

Distinguished Keynote Lecture. QC 20120214

Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2013-09-18Bibliographically approved

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Kari, Leif
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