Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Sound-Insulation Design of Aluminum Extruded Panel in Next-Generation High-Speed Train

차세대 고속철도 차량용 알루미늄 압출재의 차음 설계

  • Kim, Seock-Hyun (Dept. of Mechanical and Mechatronics Engineering, Kangwon Nat'l Univ.) ;
  • Seo, Tae-Gun (Dept. of Mechanical and Mechatronics Engineering, Kangwon Nat'l Univ.) ;
  • Kim, Jeong-Tae (Dept. of Mechanical and System Design Engineering, Hongik Univ.) ;
  • Song, Dal-Ho (Dept. of Railway Vehicle System Engineering, Woosong Univ)
  • 김석현 (강원대학교 기계.메카트로닉스공학과) ;
  • 서태건 (강원대학교 기계.메카트로닉스공학과) ;
  • 김정태 (홍익대학교 기계시스템디자인공학과) ;
  • 송달호 (우송대학교 철도차량 시스템학과)
  • Received : 2010.12.07
  • Accepted : 2011.02.15
  • Published : 2011.05.01
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Abstract

Aluminum extruded panels are widely used instead of corrugated steel panels for weight reduction in high-speed trains. Of the layers in the train body, it makes the largest contribution to the sound insulation. However, compared with that of a flat panel with the same weight, the TL of the aluminum extruded panel is remarkably lower in the local resonance frequency band. We study aluminum extruded panels for next-generation 400-km/h trains. We investigate the problem of sound insulation and propose a practical method to improve the sound-insulation performance. The local resonance frequency region is increased by a modification of the core structure, and urethane foam is placed in the core. The effect on the sound insulation is verified by experiments. Finally, the improvement for the entire sound-transmission loss is estimated for the layered floor panels of express trains.

알미늄 압출재는 고속열차의 경량화를 위하여 기존의 주름강판을 대체하여 널리 사용된다. 알미늄 압출재는 고속열차 적층재 가운데 가장 큰 차음 기여도를 보이나, 동일한 중량의 평판과 비교할 때, 국부공진 주파수 대역에서 투과손실이 크게 떨어진다. 이 연구에서는 차세대 400km/h급 고속철도 차량용 알미늄 압출재를 대상으로 차음 문제를 검토하고, 차음성능의 향상 방안을 제시한다. 코어 구조를 변경시켜 국부공진 대역을 높이고, 우레탄 폼을 코어에 충진시킬 때의 차음성능 향상효과를 실험적으로 확인한다. 최종적으로 제시된 방법이 바닥 적층재의 총 투과손실을 어느 정도 개선시키는가를 평가한다.

Keywords

References

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Cited by

  1. Analysis Sound Insulation Performance of a Corrugated Steel Panel Through Modal Density vol.40, pp.12, 2016, https://doi.org/10.3795/KSME-A.2016.40.12.1061
  2. Contribution analysis of interior noise and floor vibration in high-speed trains by operational transfer path analysis vol.9, pp.8, 2017, https://doi.org/10.1177/1687814017714986