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Acoustic Modal Analysis of Standing Wave in a Practical Intake and Exhaust System
Published October 17, 1990 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Autumn Conference
The purpose of this study is to analyze standing waves in practical intake and exhaust systems, and to clarify the pulsation phenomena. Both eigenvalue analysis by FEM applied to standing waves, and an improved experimental system to measure acoustic transfer functions are discussed in this paper. Modal parameters computed by FEM and experimental ones are in good agreement. The prediction of engine performance is also discussed by referring these modal parameters. It was found that the acoustic modal analysis introduced here can be utilized for conceptual primary design of intake and exhaust systems.