Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Transfer Path Analysis of Wind Noise on a Passenger Car
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Over the last years, due to the development of quieter engines and drivetrains, the importance of addressing the vehicle wind noise problem has significantly increased.In this thesis work, several existing Transfer Path Analysis methods have been applied on an experimental database acquired during a wind tunnel test on a passenger car with the objective of analyzing the distribution of the wind noise sources and their contribution to the target microphones located inside the vehicle. A major challenge for the Transfer Path Analysis (TPA) consists of the high complexity of the aerodynamic sources exciting the structure. Moreover, the existence of multiple incoherent source phenomena, and the presence of distributed coherent source regions of different correlation scales make the analysis very complex.The thesis work provides a solid and comprehensive analysis of the results obtained by different methods. The outcomes can be potentially useful for optimizing the vehicle NVH performance in future practical cases.

Abstract [sv]

Under de senaste åren har vikten av att arbeta med vägfordons problem med aerodynamisk ljudgenerering ökat avsevärt på grund av utvecklingen av tystare motorer och drivlinor. I det här projektet har flera existerande metoder för Transfer Path Analysis (TPA) tillämpats på en databas med experimentella data som samlats in vid vindtunneltest på en personbil, med målet att analysera fördelningen av källorna orsakade av vindbruset och deras påverkan på ljudnivån vid de uppsatta målmikrofonerna inuti fordonet. En stor utmaning för TPA är den höga komplexiteten hos de aerodynamiska källorna som exciterar strukturen. Vidare gör förekomsten av flera okorrelerade källor, och närvaron av distribuerade koherenta källregioner med olika korrelationsskalor, analysen mycket komplex. Arbetet presenterar en solid och omfattande analys av resultat som erhållits med olika metoder. Resultaten är potentiellt användbara för att optimera fordonets NVH-prestanda i praktiktiken i framtiden.

Place, publisher, year, edition, pages
2019. , p. 113
Series
TRITA-SCI-GRU ; 2019:003
Keywords [en]
Transfer Path Analysis (TPA), Wind Noise, Principle Com-ponent Analysis (PCA), Matrix Inversion Method
Keywords [sv]
Transfer Path Analysis (TPA), Wind Noise, Principle Com-ponent Analysis (PCA), Matrix Inversion Method
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-261091OAI: oai:DiVA.org:kth-261091DiVA, id: diva2:1356348
External cooperation
Siemens PLM
Examiners
Available from: 2019-10-02 Created: 2019-10-01 Last updated: 2019-10-02Bibliographically approved

Open Access in DiVA

fulltext(16866 kB)1 downloads
File information
File name FULLTEXT01.pdfFile size 16866 kBChecksum SHA-512
ebc35f5406edad55b68f5a1e721f0e5852999ab82a221036b94ab5a26fd56f1f3be64cce56f21b97b41ee7703773626a6a39d4e32d9d1b4df43352f4c7bd3a54
Type fulltextMimetype application/pdf

By organisation
Aeronautical and Vehicle Engineering
Vehicle Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 1 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 3 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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