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

  • 제40권12호
  • /
  • Pages.1061-1066
  • /
  • 2016
  • /
  • 1226-4873(pISSN)
  • /
  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

주름 강판의 모드 밀도에 따른 차음 성능 분석

Analysis Sound Insulation Performance of a Corrugated Steel Panel Through Modal Density

  • 김석현 (강원대학교 메카트로닉스공학과) ;
  • 변준호 (강원대학교 대학원 기계융합공학과) ;
  • 이중혁 (강원대학교 대학원 기계융합공학과)
  • Kim, Seockhyun (Dept. of Mechatronics Engineering, Kangwon Nat'l Univ.) ;
  • Byeon, Jun Ho (Dept. of Convergence Engineering, Graduate School, Kangwon Nat'l Univ.) ;
  • Lee, Joong Hyeok (Dept. of Convergence Engineering, Graduate School, Kangwon Nat'l Univ.)
  • 투고 : 2016.01.28
  • 심사 : 2016.09.02
  • 발행 : 2016.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

주름 강판의 주름은 강판의 중량당 굽힘 강성을 획기적으로 증가시킨다. 그러나 주름 강판은 같은 중량을 갖는 평판보다 낮은 차음 성능을 보인다. 특히, 특정한 주파수대역에서는 투과손실이 크게 감소한다. 이 문제의 주 요인은 주름단위에서의 국부적 공진으로 알려져 있다. 특정 주파수대역에서 다수의 국부적 공진모드가 발생하고 모드밀도가 급속히 증가한다. 본 연구에서는 음 투과손실과 모드 밀도 사이의 관계를 검토한다. 최종적으로, 중량의 증가 없이 주름 강판의 차음 성능을 향상시키기 위한 모드 밀도의 측면에서의 설계전략을 제시한다.

Corrugation of a corrugated panel dramatically increases the bending stiffness per weight. However, corrugated panels show lower sound insulation performance than that of the flat plate having the same weight. Especially, in a particular frequency region, the sound transmission loss significantly decreases. Main reason of the problem is known as the local resonance. A number of local resonance modes occur above a certain frequency band and modal density rapidly increases. In this study, we investigate the relation of the sound transmission loss and the modal density. Finally, we propose a design methodology in terms of the modal density to improve the sound insulation performance of the corrugated panels without weight increase.

키워드

참고문헌

  1. Cordonnier-Cloarec, P., Pauzin, S. and Biron, D., 1992, "Contribution to the Study of Sound Transmission and Radiation of Corrugated Steel Structures," Journal of Sound and Vibration, Vol. 157, pp. 515-530. https://doi.org/10.1016/0022-460X(92)90530-B
  2. Windle, R. M. and Lam, Y. W., 1993, "Prediction of the Sound Reduction of Profiled Metal Cladding," Inter-Noise'93, Vol. 2, pp. 999-1002.
  3. Kim, S. H., Paek, I. S., Lee, H. W. and Kim, J. T., 2008, "Prediction Model of the Sound Transmission Loss of Honeycomb Panels for Railway Vehicles," Journal of the korean Society for Railway, Vol. 11, No. 5, pp. 465-470.
  4. Kim, S. H., Lee, H. W., Kim, J. T. and Kim, J. C., 2010, "Sound Insulation Design of the Corrugated Steel Panel Considering Local Resonance," Journal of the KSNVE, Vol. 20, No. 7, pp. 672-676. https://doi.org/10.5050/KSNVE.2010.20.7.672
  5. Kim, S. H., Seo, T. K. and Kim, J. T., 2010, "Improvement Effect of the Sound Insulation Performance of the Corrugated Steel Panel by Sound Absorbing and Damping Materials," Journal of the Korean Society for Railway, Vol. 13, No. 5, pp. 476-480.
  6. Kim, S. H., Park, J. C. and Kim, J. N., 2000, "Sound Transmission Loss of Aluminum Extruded Panels for Railway Vehicles," Transactions of KSNVE, Vol. 10, No. 4, pp. 662-668.
  7. Kim, S. H., Seo, T. G. Kim, J. and Song, D., 2011, "Sound Insulation Design of Aluminum Extruded Panel in Next-Generation High-Speed Train," Trans. Korean Soc. Mech. Eng. (A), Vol. 35, No. 5, pp. 567-574. https://doi.org/10.3795/KSME-A.2011.35.5.567
  8. Xie, G., Thompson, D. J. and Jones, C. J. C., 2004, "Mode Count and Modal Density of Structural Systems: Relationship with Boundary Conditions," Journal of Sound and Vibration, Vol. 274, pp. 621-651. https://doi.org/10.1016/j.jsv.2003.05.008
  9. ASTM E 2249 - 02 : American Standards for Testing and Materials, 2003, Standard Test Method for Laboratory Measurement of Airborne Transmission Loss of Building Partitions and Elements Using Sound Intensity, American Standard Association.
  10. Choi, S. H., Kim, J. C., et al., 2004, "Interior Noise of a KTX Vehicle in a Tunnel," Proceedings of Annual Conference of the Korea Society for Railway, pp. 88-92.