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Developing assumptions for the tram noise attenuation passive system using the noise maps analysis method
Abstract
The paper presents experimental research carried out to determine the possible actions to reduce the
noise generated by trams in a highly urbanised area. A few design strategies affecting tram ride quality
have been presented – especially in the aspect of the acoustic phenomena. Main sources of the noise
in trams were characterised. The paper includes selected results of comprehensive studies of tram noise in
the pass-by test based on the authors’ research methodology. The tests were carried out on various
types of trams to recognise the acoustic phenomena characteristic for the rolling stock in a selected tram
system. The results of the measurements were analysed both in the field of amplitudes based on noise
maps and in respect to frequencies based on noise spectra. The results indicated the rolling noise as
important issue demanding taking some actions in order to reduce its level. In this area, elements for the
application of individual attenuation solutions, i.e. at the source and during propagation, were presented.
The results of the measurements were used as input data to the assumptions of the noise attenuation
passive system, which was the final outcome of the study. Dedicated external dampers were used in the
case of wheel and rail pairs, where the dominant power of the noise is emitted. The acoustic properties
of the bogie area and the bogie side covers were redeveloped to hamper the noise propagation, which is
a novel application. The presented results indicate measurable benefits from the applied solutions on the
tram noise reduction.
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- Category:
- Magazine publication
- Type:
- Magazine publication
- Published in:
-
Archives of Acoustics
no. 44,
edition 4,
pages 783 - 792,
ISSN: 0137-5075 - Publication year:
- 2019
- Bibliographic description:
- http://acoustics.ippt.gov.pl/index.php/aa/article/view/2476/pdf_453
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/aoa.2019.129733
- Verified by:
- No verification
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