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A Study on the Improvement of Radiated Noise in SCR Muffler of Commercial Vehicle

상용차용 SCR 머플러의 방사소음 개선에 관한 연구

  • 이동원 (자동차부품연구원 에너지시스템연구센터) ;
  • 김완수 (자동차부품연구원 에너지시스템연구센터) ;
  • 배철용 (자동차부품연구원 에너지시스템연구센터) ;
  • 김찬중 (자동차부품연구원 에너지시스템연구센터) ;
  • 권성진 (자동차부품연구원 에너지시스템연구센터) ;
  • 이봉현 (자동차부품연구원 에너지시스템연구센터)
  • Published : 2008.08.20

Abstract

This study presents the design modification for SCR muffler of a commercial vehicle. Its main objective is the reduction of radiated noise at SCR muffler. For this study, the research of five steps were achieved by experimental and CAE analysis. First step is the measurement of radiated noise using impact-acoustic test. Second step is the source identification using experimental modal analysis. The cause of radiated noise source is confirmed by the resonance of end plates at SCR muffler. Third step confirms the possibility of resonance avoidance using SDM analysis applied the mass control. Fourth step is the suggestion of design modification which is the change of mode shape by CAE analysis. Last step is the verification of design modification using SYSNOISE analysis. Finally, the prototype product applied the countermeasure of resonance evasion was manufactured and the reduction of radiated noise at SCR muffler was confirmed by pass-by noise test.

Keywords

References

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