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Development of Improvement Technology of Sound Insulation Performance of Unitex Structure

유니텍스 구조의 차음성능 향상기술 개발

  • Byeon, Jun-Ho (Dept. of Advanced Mechanical Engineering, Graduate School, Kangwon Nat'l Univ.) ;
  • Lee, Joong-Hyeok (Dept. of Advanced Mechanical Engineering, Graduate School, Kangwon Nat'l Univ.) ;
  • Kim, Seockhyun (Dept. of Advanced Mechanical Engineering, Kangwon Nat'l Univ.) ;
  • Lee, Jae-Joon (Shinil Chemical co., ltd.) ;
  • Ki, Ho-Cheol (Hyundai - Rotem co.)
  • 변준호 (강원대학교 대학원 융합공학과) ;
  • 이중혁 (강원대학교 대학원 융합공학과) ;
  • 김석현 (강원대학교 기계융합공학부) ;
  • 이재준 ((주) 신일화학) ;
  • 기호철 (현대로템 응용기술연구팀)
  • Received : 2016.04.14
  • Accepted : 2016.05.25
  • Published : 2016.09.01

Abstract

Unitex is widely used for the floor structure of urban railway vehicles because it shows good structural safety and heat insulation, has long life, and lowers the cost owing to easy installation. However, in spite of these merits, Unitex has a limit to the sound insulation performance, which is very important in vehicle structure. It shows a sound transmission loss considerably lower than the mass law value, which indicates the sound insulation performance per unit weight. Recently, railway vehicle manufacturers and Unitex supplier have tried to improve the sound insulation performance of Unitex, but meaningful results have not been achieved yet. Through the industry-university collaborative research, we propose structural improvement methods to increase the sound transmission loss by more than 5dB and we then verify the effect by performing experiments.

유니텍스는 높은 강도과 우수한 단열성, 긴 수명 및 간편한 시공에 따른 저렴한 제작비 때문에 대부분의 도시철도 차량의 바닥 구조로 널리 사용되고 있다. 그러나 여러 가지 우수성에도 불구하고, 이 구조는 차량 적층재에서 중요한 차음성능 측면에서는 여전히 문제점을 갖고 있다. 기존 제품은 중량대비 차음성능의 척도인 질량법칙 투과손실치에 비해 현저히 낮은 투과손실을 보인다. 최근 차량 제작사와 시공사는 차음성능을 높이기 위하여 많은 노력을 시도하여왔으나 큰 효과가 없었다. 이에 본 산학협동 연구에서는 기존 제품 대비 5dB 이상 차음성능을 향상시키는 것을 목표로, 적층재의 구조개선 방안을 도출하고 개선효과를 실험적으로 검증한다.

Keywords

References

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