Journal of KSNVE (소음진동)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Noise Analysis of Intake System by Hybrid Method

하이브리드 방법을 이용한 배기계 소음 해석

  • 이장명 (울산대학교 공과대학 자동차공학과) ;
  • 한성수 (울산대학교 대학원 자동차공학과) ;
  • 임학종 (세종공업(주))
  • Published : 1999.04.01
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Abstract

4-Pole parameter method based on an acoustic theory is very popular for the analysis of the acoustic behavior of the car exhaust system. However, this method is applicable only for the simple shape of acoustic elements of the muffler. Numerical methods such as FEM(Finite Element Method) or BEM(Boundary Element Method) can also provide acceptable results for the acoustic analysis of the car exhaust system. Even though these numerical methods have benefits for the analysis of complicated shape of acoustic elements of the muffler, time consuming is another problem during modeling and numerical calculation. Combining benefits of both methods, the new code called the hybrid method for car exhaust system is introduced. And the developed code is utilized for calculation of the transmission loss of a main muffler of an automobile comparing with the experimental results.

Keywords

References

  1. J. Acoustic. Soc. Am. v.57 Prediction of Transmission Loss in Mufflers by Finite-Element Method Cheng-I James Young;Malcolm, J. Croker.
  2. ASME v.112 Acoustic Characteristics of an Expansion Chamber With Constant Mass Flow and Steady Temperature Gradient(Theory and Numerical Simulation) Yang-Hann Kim;Jae-Woong Choi
  3. J. Acoustic. Soc. Am. v.69 no.4 Evaluation of Four-Pole Parameters for a Straight Pipe with a Mean Flow and a Linear Temperature Gradient Prasad M. G.;Malcolm;J. Croker
  4. J. Sound and Vibration v.39 Velocity Ratio Transfer Matrix Method for the Evaluation of a Muffler with Mean flow Munjal, M. L.
  5. SAE Paper No. 953708 An Analysis of Intake System using BEM and 1-D Solution C. M Lee;O. S. Kwon
  6. J. Sound Vib. v.112 Theoreical Predictin of the Transmission Loss of Circular Reversing Chamber Mufflers J-G.Ih;B.-H.Lee
  7. J. Vibration and Acoustic. General Solution of Acoustic Wave Equation for Circular Reversing Chamber with Temperature Gradient Yang-Hann Kim;Jae-Woong Choi
  8. J. Acoustic. Soc. Am. v.66 no.3 A Method of Modeling Perforated Tube Muffler Components Ⅱ. Application Sullivan, J.W.
  9. Fundamentals of Acoustics Kinslet, L. E.;Freqy, A. R.;Coppins, A. B.;Sanders, J. V.
  10. Acoustic of Ducts and Mufflers Munjal, M. L.
  11. SAE Paper No. 850982 Theory and Practice in Exhaust System Eriksson, L. J.;Thaw, P. T.