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

주름 강판의 모드 밀도에 따른 차음 성능 분석

  • 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.)
  • 김석현 (강원대학교 메카트로닉스공학과) ;
  • 변준호 (강원대학교 대학원 기계융합공학과) ;
  • 이중혁 (강원대학교 대학원 기계융합공학과)
  • Received : 2016.01.28
  • Accepted : 2016.09.02
  • Published : 2016.12.01

Abstract

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.

Keywords

Corrugated Panel;Sound Transmission Loss;Modal Density

Acknowledgement

Grant : 풍력발전단지 차세대 핵심기술 고급트랙

Supported by : 강원대학교, 산업통상자원부

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