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Radiation Noise Due to Longitudinal Vibration of the Exhaust Pipe
Technical Paper
852266
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Language:
English
Abstract
The front exhaust pipe and the heat-shield plate of the catalytic converter are excited by the engine vibration. Noise radiation occurs on their surface. Concerning vehicle exterior noise, noise radiated from the exhaust system is often one of major sources as well as engine and exhaust noise.
This paper describes the longitudinal vibration model-as a beam-is applied to the high frequency vibration that causes the noise radiated from the exhaust system. It describes also some methods of reducing such noise radiation by isolating the vibration from the front exhaust pipe. These methods are: adding mass to the front pipe, changing the material of the front pipe to a smaller Young's modulus one, installing flexible pipe composed by two sections, and so on.
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Authors
Citation
Shimura, A., "Radiation Noise Due to Longitudinal Vibration of the Exhaust Pipe," SAE Technical Paper 852266, 1985.Also In
References
- Watari Atsushi Mechanical Dynamics, Kyoritsu Zensho 50 62
- Hayasaka Toshio Yoshikawa Shohkichiro Theory of Acoustic Vibration Maruzen 405 433
- Ohnaka Itsuo Nishiwaki Jinichi Hirata Ken Proceedings of the Society of Mechanical Engineers 35 277 1874 1888