Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Noise Characteristics and Frequency Response Function on Implementation of AZ31 Magnesium Alloy to Automobile Hood Panel

AZ31 마그네슘합금의 자동차 Hood Panel적용에 따른 주파수응답 및 소음 특성의 변화

  • Lee, Choong-Do (Department of Metallurgical and Materials Engineering, Inha Technical College) ;
  • Yeo, Dong-Hoon (Metallurgical Material Lab. Team, PG & Labs Division, Technical Center, GM Daewoo Auto & Technology (GMDAT))
  • 이충도 (인하공업전문대학 금속재료과) ;
  • 여동훈 (지엠대우오토앤테크놀로지 금속재료시험팀)
  • Received : 2010.06.04
  • Accepted : 2010.08.23
  • Published : 2011.01.01
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Abstract

In present study, it aims to compare the noise and vibration characteristics between magnesium alloy and steel hood panel. The AZ31 magnesium hood panel was fabricated through warm forming process, and the noise and vibration characteristics between both hood panels was compared through the measurement of engine radiation noise and transmission loss, as well as FRF on modal analysis. The sound insulation performance of magnesium alloy was wholly superior to that of steel hood panel, even though the transmission loss of magnesium alloy is lower than that of steel due to mass effect primarily. The FRF characteristics on modal analysis indicates that the resonance frequency of magnesium hood panel is remarkably increased to higher value than that of steel hood panel. The radiation and interior noise of magnesium panel even without acoustic hood insulation were remarkably lower than those of steel hood panel with acoustic insulation, in particular, at a range below 4,000 rpm.

Keywords

References

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