Journal
JOURNAL OF SOUND AND VIBRATION
Volume 393, Issue -, Pages 30-40Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2016.11.024
Keywords
Vibration reduction; Granular materials; Honeycomb structures; Laser scanning vibrometry; Particle damping; Engine test bench
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Funding
- European Union through the European Funds for Regional Development (EFRE)
- German State of Saxony-Anhalt [ZS/2016/04/78118]
- Alexander von Humboldt Foundation
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In this paper, the damping effect of granular materials is explored to reduce the vibration and noise of mechanical structures. To this end, a honeycomb structure with high stiffness is used to contain a granular filling which presents the possiblity for the distribution of the granular material to be designed. As a particular application example, the oil pan bottom of a combustion engine is used to investigate the influence on the vibration behavior and the sound emission. The effect of the honeycomb structure along with the granular mass, distribution, and type on the vibration behaviour of the structure is investigated via laser scanning vibrometry. From this, an optimized filling is determined and then its noise suppression level validated on an engine test bench through measurements with an acoustic array. (C) 2017 Elsevier Ltd. All rights reserved.
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