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Constrained polymer layers to reduce noise: reality or fiction? - An experimental inquiry into their effectiveness
KTH, Superseded Departments, Vehicle Engineering.ORCID iD: 0000-0001-5760-3919
KTH, Superseded Departments, Vehicle Engineering.
KTH, Superseded Departments, Vehicle Engineering.ORCID iD: 0000-0002-9632-8398
KTH, Superseded Departments, Vehicle Engineering.
2002 (English)In: Polymer testing, ISSN 0142-9418, E-ISSN 1873-2348, Vol. 21, no 8, 949-958 p.Article in journal (Refereed) Published
Abstract [en]

The frequency and temperature dependent noise radiation properties of constrained polymer layered oil pans are examined through mobility and intensity measurements. Four metal/polymer/metal sandwich composites of varied thermo-plastic elastomer systems of polystyrene-polybutadiene-polystyrene triblock copolymers are investigated within a wide frequency range covering 1000-5000 Hz, and over a wide temperature range covering 20-100 degreesC, with results compared to those of an ordinary steel oil pan. The mobility and intensity are found to be strongly frequency and temperature dependent, displaying a substantial mobility reduction as compared to that of the ordinary pan, while using the constrained layer damping configurations at their maximum loss factor temperatures. However, the reduction of noise radiation is smaller than that of the mobility at those temperatures, mainly due to the increased radiation efficiency while adding damping materials.

Place, publisher, year, edition, pages
2002. Vol. 21, no 8, 949-958 p.
Keyword [en]
constrained layer damping, noise, thermo-plastic elastomer, polystyrene, polybutadiene, triblock copolymer, oil pan, intensity, mobility, orthotropic cylindrical-shells, finite-element analysis, latex ipn materials, vibration control, viscoelastic layers, damping properties, beams, plate, behavior, core
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-21852DOI: 10.1016/S0142-9418(02)00041-7ISI: 000177685900014OAI: diva2:340550
QC 20100525 NR 20140804Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2012-02-11Bibliographically approved

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Kari, LeifFeng, Leiping
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