Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)

  • 2001.05a
  • /
  • Pages.849-854
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  • 2001
  • /
  • 1598-2548(pISSN)
The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Cabin Noise Reduction of a Maglev Train

자기부상열차의 소음저감

  • 김현실 (한국기계연구원 음향연구그룹) ;
  • 김재승 (한국기계연구원 음향연구그) ;
  • 강현주 (한국기계연구원 음향연구그) ;
  • 강현주 (한국기계연구원 음향연구그) ;
  • 김상렬 (한국기계연구원 음향연구그룹)
  • Published : 2001.05.01
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Abstract

Cabin noise reduction in maglev trains developed by KIMM is studied. Based on the measurements of cabin noise and acceleration levels during running and zero speed conditions, dominant noise sources are identified. After spectra characteristics of noise sources is investigated, efficient noise reducing methods are studied such as STL increasement of floor panels, sealing, and absorption treatment. It is found that the most important noise sources are VVVF inverter and SLIM in running condition. Since the noise sources are under the cabin floor, complete sealing and high STL of the floor panel are shown to be the most crucial factors in noise reduction. After polyurethan form (50t) is added for more sound absorption and sealing treatment, the cabin noise is reduced by 3-4 ㏈.

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