도시철도 터널 내부 콘크리트 도상국소공명흡음판의 흡음계수 및 구조안정성평가를 위한 계측시스템 개발
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
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초록
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 구간에서의차량 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.
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.
참고문헌 (7)
- Lee, D. H., "Estimation of the Absorption Performance of Multiple Layer Perforated Panel System by Transfer Matrix Method", Journal of Sound and Vibration, 278, pp.847~860 (2004)
- 이홍주, "도시철도 터널내 콘크리트 도상용 흡음블럭의 최적 배합설계", 한국터널지하공간학회 논문집, 18(1), pp.75~82 (2016), 사단법인 한국터널지하공간학회
- Oh, S. T., "Structural Behavior Test and Specification of Sound Absorbing Panels on the Concrete Track", Proceedings of 2016 autumn KSR Conference (2016)
- Shimokura, R., "Characteristics of Train Noise in Above-Ground and Underground Stations with Side and Island Platforms", Journal of Sound and Vibration, 330, pp.16219~11633 (2011)
- Konstantinos Vogiatzis, "Noise reduction in urban LRT networks by combining track based solutions", Science of The Total Environment, 568, pp.1344~1354 (2016), Elsevier BV[DOI]
- Yang, Y. S., "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 (2014)