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2017 Vol.19, Issue 1
Developments of monitoring system to measure sound absorbing coefficient and structural stability of sound absorbing panel on the concrete track in the urban train tunnel

도시철도 터널 내부 콘크리트 도상 국소공명흡음판의 흡음계수 및 구조안정성 평가를 위한 계측시스템 개발

Soon-Taek Oh1*
,
Dong-Jun Lee2
,
Dong-Hoon Lee3
오 순택1*
,
이 동준2
,
이 동훈3
1Seoul National University of Science and Technology, Dept. of Civil Engineering, Professor
2Seoul National University of Science and Technology, Dept. of Civil Engineering, Research Fellow
3Seoul National University of Science and Technology, Dept. of Mechanical and Automotive Engineering, Professor
1서울과학기술대학교 건설시스템공학과 교수
2서울과학기술대학교 건설시스템공학과 강사
3서울과학기술대학교 기계자동차공학과 교수
*교신저자. *Corresponding Author. 
31 January 2017. pp. 1-9
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Abstract

In this study, a test-bed system simulated a tunnel and concrete track is tested on cite and invested an allowed limit of multi-layered sound absorbing panel for reducing noise reflected on the concrete track in train tunnel considering the criteria and limitation on the theoretical back ground. The studied results are an effective evaluating system of the sound absorbing coefficient influenced fluid effects depending on the vehicle speed in the urban train tunnel and measuring not only structural behaviors of maximum displacement and acceleration of the panel but also dynamic characteristics of damping ratio and natural frequency.

Keywords
Concrete track
Sound absorbing panel
Structural behavior test
Increasing fluid pressure by the vehicle running speed
Maintenance criteria in tunnel

본 연구에서는 터널 내 콘크리트 도상을 모사하여 현장실험을 수행하였다 그리고 도시철도터널 내 콘크리트도상의 반사소음을 저감하기 위한 다중국소공명 흡음판의 이론적 평가항목과 한계를 고려하여 허용한계를 연구하였다. 본 연구결과는 도시철도 터널 구간에서의 차량 주행속도에 따른 유동 영향에 의한 흡음판의 흡음계수를 분석하고, 구조안정성을 효율적으로 평가할 수 있는 최대 변위와 변위가속도 및 동적특성인 감쇠비와 고유진동수를 효과적으로 도출할 수 있는 계측시스템을 제안한다.

키워드
콘크리트도상
국소공명흡음판
구조적 거동측정
차량속도에 의해 증가되는 유동압력
터널 내 유지관리항목
References
1
1.Lee, D.H., Kwon, Y.P. (2004), “Estimation of the Absorption Performance of Multiple Layer Perforated Panel System by Transfer Matrix Method”, Science Direct, Journal of Sound and Vibration, Vol. 278, pp. 847-860.
2
2.Lee, H.J., Oh, S.T., Lee, D.J. (2016), “An Optimal Mix Design of Sound Absorbing Block on Concrete Ballast in Urban Train Tunnel”, Journal of Korean Tunnel Underground Space Association, Vol. 18, No. 1, pp. 75-82.
3
3.Morgan, P.A., Peeling, J. (2012), “Railway Noise Mitigation from Tunnels”, Technical Report, www.51m. co.uk/wp-content/uploads//Factsheet-04-nov-2012-Railway-Tunnels-Portals.pdf.
4
4.Oh, S.T., Lee, D.J., Lee, D.H. (2016), “Structural Behavior Test and Specification of Sound Absorbing Panels on the Concrete Track”, Proceedings of 2016 autumn KSR Conference.
5
5.Shimokura, R., Soeta, Y. (2011), “Characteristics of Train Noise in Above-Ground and Underground Stations with Side and Island Platforms”, Science Direct, Journal of Sound and Vibration, Vol. 330, pp. 16219-1633.
6
6.Vogiatzis, K., Vanhonacker, P. (2015), “Noise Reduction in Urban LRT Networks by Combining Track Based Solutions”, Science of the Total Environment, http://dx.doi.org/10.1016/j.scitotenv. 2015.05.060.
7
7.Yang, Y.S., Baek, D.S., Lee, D.H., Kim, J.C., Park, C.K. (2014), “An Experimental Study on the Multiple Layer Perforated Panel Sound Absorbing System for Railroad Noise Reduction”, International Symposium on Green Manufacturing and Applications Proceedings, pp. 117-119.
Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 19
  • No :1
  • Pages :1-9
  • Received Date : 2016-12-12
  • Revised Date : 2017-01-09
  • Accepted Date : 2017-01-10
  • DOI :https://doi.org/10.9711/KTAJ.2017.19.1.001
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