Assessment of the noise radiation from engine covers
Thompson, D.J., Grice, R.M. and Blaha, R. (2002) Assessment of the noise radiation from engine covers. In, ImechE Conference Transactions; European Conference on Vehicle Noise and Vibration 2002. European Conference on Vehicle Noise and Vibration London, UK, Automotive Information Centre, MIRA Ltd, 215-226.
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Description/Abstract
Lightweight flexible structures, such as valve covers, sumps and front covers, can
contribute substantially to the overall radiated sound from an engine. It is important to be
able to quantify this. Moreover, the designer is often faced with choices in material,
geometry and mounting configurations that have implications for noise radiation. Simple
measurement methods are described that can be used to characterise a cover without
needing a running engine. These include the determination of the radiation efficiency of a
cover and its spatial transmissibility, that is, the average vibration of the cover divided by the
average vibration of the underlying structure, which can be used to compare different
mounting arrangements as well as cover designs. In addition, simple analytical modelling
techniques are described that have been developed to describe the noise radiation from
covers. These use a small number of parameters in order to obtain rapid understanding of
the general trends.
| Item Type: | Book Section |
|---|---|
| Additional Information: | Powertrain 11JUN2002, p 215 (12 p, 8 fig, 11 ref) Doc No198866, (In ENGLISH) |
| Keywords: | ENGINE COMPONENTS, NOISE REDUCTION, NOISE VIBRATION HARSHNESS |
| Subjects: | Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Dynamics |
| Item ID: | 10063 |
| Date Deposited: | 22 Sep 2005 |
| Last Modified: | 02 Mar 2012 12:02 |
| Contributors: | Thompson, D.J. (Author) Grice, R.M. (Author) Blaha, R. (Author) |
| Date: | 2002 |
| Additional Information: | Powertrain 11JUN2002, p 215 (12 p, 8 fig, 11 ref) Doc No198866, (In ENGLISH) |
| Status: | Published |
| Publisher: | Automotive Information Centre, MIRA Ltd |
| URI: | http://eprints.soton.ac.uk/id/eprint/10063 |
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