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Tuning of the acoustic source model: Aiming at accurate noise assessments along high-speed railways
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Sveriges tekniska forskningsinstitut / Akustik (Eta).
2015 (English)Report (Refereed)
Abstract [en]

The former SP acoustic source model for noise assessments along high-speed railways has been tested and inspected. It is proved that in general the SP acoustic source model works quite well in the important frequency range when no noise barrier presented. However, the test calculation also showed a need for a further study on the pantograph noise emission data because this high-location noise source is the most concern for applying a proper noise measure along the Sweden’s first high-speed line, the East Link. The inspection made in Project 1 proposed to lower the pantograph noise emission data by 1.5 dB. In this project, Project 2, the report from Project 1 was taken as the input. After a systematic study on the issue, it was concluded that it is acceptable to reduce the pantograph noise emission data by 1.5 dB. Moreover, by referring to the representative European HST pass-by data provided by Project 1, the following revisions are made: (1) the noise emission data for rolling noise at 3150 Hz was reduced by 2.5 dB; (2) the bogie component of aerodynamic noise below 315 Hz is handled differently than higher frequencies because of the monopole feature; (3) rolling noise components above 5000 Hz are handled differently than lower frequency components. Furthermore, pantograph noise below 200 Hz was made free of resonance peaks. The tuned noise emission data has been worked out and provided in tabular values for each of the four partial sources (rail/track, wheel, aero-bogie and pantograph), for a frequency range from 25 Hz to 10000 Hz and a speed range from 30 km/h to 320 km/h. Dispersions of the noise data for rolling noise, aerodynamic noise and pantograph noise were also investigated.

Place, publisher, year, edition, pages
2015.
Series
SP Rapport, ISSN 0284-5172 ; 2015:42
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-5270Local ID: 27059OAI: oai:DiVA.org:ri-5270DiVA, id: diva2:962911
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2018-06-08Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
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