Tyre exterior noise is the result of the combination of many complex phenomena taking place at tyre/road contact. Tread impact, stick/slip of the tread blocks and air-pumping are only some of the excitation mechanisms, whose effect can be amplified by the tyre structural vibrations, by the pipe resonances of the longitudinal grooves in the contact patch and by the aerodynamic phenomena in the leading and trailing footprint regions. Indoor tests are of fundamental support in the development of new products, in terms of optimization of both tread pattern design and structural solutions. This paper illustrates the test methodologies developed within a research cooperation between Politecnico di Milano and Pirelli Tyre, for mapping the noise generated by a rolling tyre during the experiments carried out in semi-anechoic chamber. Noise source identification is performed through microphone array techniques, while the radiated sound field is characterized in terms of directivity patterns for variable frequency. In both cases the measurement equipment is fitted with a robotic handling system to speed up the stepped positioning of the microphones.

Test methodologies for mapping tyre exterior noise in semi-anechoic chamber

Corradi Roberto;Ripamonti Francesco;
2019-01-01

Abstract

Tyre exterior noise is the result of the combination of many complex phenomena taking place at tyre/road contact. Tread impact, stick/slip of the tread blocks and air-pumping are only some of the excitation mechanisms, whose effect can be amplified by the tyre structural vibrations, by the pipe resonances of the longitudinal grooves in the contact patch and by the aerodynamic phenomena in the leading and trailing footprint regions. Indoor tests are of fundamental support in the development of new products, in terms of optimization of both tread pattern design and structural solutions. This paper illustrates the test methodologies developed within a research cooperation between Politecnico di Milano and Pirelli Tyre, for mapping the noise generated by a rolling tyre during the experiments carried out in semi-anechoic chamber. Noise source identification is performed through microphone array techniques, while the radiated sound field is characterized in terms of directivity patterns for variable frequency. In both cases the measurement equipment is fitted with a robotic handling system to speed up the stepped positioning of the microphones.
2019
INTER-NOISE 2019 - 48th International Congress and Exhibition on Noise Control Engineering: Noise Control for a Better Environment
978-84-87985-31-7
Noise source mapping, sound field maps, tyre noise
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1118809
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact