High frequency noise suppression of the automobile exhaust system

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Abstract

The paper presents the decision for the question of the excessive catalytic collector high frequency noise in the automobile engine exhaust system. The high level noise has been observed under the idle state engine condition. In order to understand the causes of the high catalytic collector noise emission the research of its vibroacoustic internals has been performed. An experimental stand for the acoustic and vibration response on broadband dynamic excitation tests has been created. The power of the acoustic noise, emitted by the catalytic collector and vibration distribution of its surface have been defined. It was found that the catalytic collector surface has the low acoustic impedance in the high frequency range. The surface vibration damper design has been developed. A special material, so called metal rubber, has been used to damp the vibration. The main advantage of this material is the temperature tolerance, quite useful for the engine exhaust system unit. The use of the damper has allowed to reduce the structure-born noise of the catalytic collector.

 

Key words: catalytic collector; structure-born noise; automobile; acoustic power; acoustic impedance; metal rubber

About the authors

G. M. Makaryantz

Самарский государственный аэрокосмический университет имени академика С.П. Королёва (национальный исследовательский университет)

Email: georgy.makaryants@gmail.com
Russian Federation

K. A. Kryuchkov

Самарский государственный аэрокосмический университет имени академика С.П. Королёва (национальный исследовательский университет)

Email: pas@ssau.ru
Russian Federation

A. I. Safin

Самарский государственный аэрокосмический университет имени академика С.П. Королёва (национальный исследовательский университет)

Email: pas@ssau.ru
Russian Federation

A. N. Kryuchkov

Самарский государственный аэрокосмический университет имени академика С.П. Королёва (национальный исследовательский университет)

Email: pas@ssau.ru
Russian Federation

M. I. Fesina

Тольяттинский государственный университет

Email: pas@ssau.ru
Russian Federation

I. V. Malkin

Тольяттинский государственный университет

Author for correspondence.
Email: pas@ssau.ru
Russian Federation

References

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Copyright (c) 2015 Journal of Dynamics and Vibroacoustics


Journal of Dynamics and Vibroacoustics

ISSN 2409-4579 (Online)

Publisher and Founder: Samara National Research University, 34, Moskovskoye shosse, Samara, 443086, Russian Federation.

Extract from the register of registered media

Editor-in-chief:  Academician of the RAS
E. V. Shakhmatov 

4 issues per year.

Free price

Editorial address: room 324, 43, Gaya street, Samara, 443086

Address for correspondence: 34, Moskovskoye shosse, Samara, 443086, Russian Federation, Samara National Research University (room 324, building 14)

Phone: 8 (846) 267 47 66

e-mail: dynvibro@ssau.ru

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