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400㎞/h급 고속철도 소음저감용 방음벽 상단장치 개발에 관한 연구
윤제원(Je Won Yoon),김영찬(Young Chan Kim),장강석(Kang Seok Jang),홍병국(Byung Kook Hong),엄기영(Young-Ki Eum) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.4
본 연구의 목적은 400㎞/h 급 고속철도 소음저감용 방음벽 상단장치를 개발하기 위함이다. 이를 위해 우선 현장에서의 소음측정을 통한 400㎞/h 급 고속철도(HEMU) 및 300㎞/h 급 KTX의 주파수특성을 분석하였다. 그리고, 해석적 기법(BEM) 및 시작품 제작을 통한 실내실험을 수행하여 3dB(A) 이상의 소음을 저감시킬 수 있는 상단장치를 설계하였다. 마지막으로, 상단장치 시작품을 제작하여 옥외실험에서의 성능시험을 수행하였으며, 고속철도의 주파수특성을 반영한 상단장치 설치 전후의 감음량을 평가하였다.
축소모형 방음벽 상단장치의 성능예측 및 평가에 관한 연구
윤제원(Je-Won Yoon),김영찬(Young-Chan Kim),장강석(Kang-Seok Jang),홍병국(Byung-Kook Hong) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
The purpose of this study is to set up an acoustic prediction technique and to perform the IL test of scale down noise reducing device for the development of the noise reducing device as the development of 400km/h class high speed train. First of all the IL prediction of noise reducing device was performed with the 2D BEM method. And the noise test of scale down noise reducing device in anechoic chamber was performed for the verification of acoustic prediction technique and IL performance evaluation. As the results the acoustic prediction technique for the development of noise reducing device was verified because the averaged IL difference between prediction and test is in 2dB(A). And the measured IL value of noise reducing device is less than 2dB(A) and additional IL with polyester absorption material is increased about 0.5dB(A).
400 km/h급 고속철도의 소음저감을 위해 방음벽 상부에 설치하는 소음저감장치 개발에 관한 연구
윤제원(Je-Won Yoon),김영찬(Young-Chan Kim),장강석(Kang-Seok Jang),홍병국(Byung-Kook Hong),엄기영(Ki-Young Eum) 한국소음진동공학회 2013 한국소음진동공학회 논문집 Vol.23 No.9
The purpose of this study is to develop a noise reduction device installed at the top of noise barrier for further decreasing of noise level of 400 km/h class high-speed railroad. For this, the frequency spectrum of 400 km/h class high-speed railroad was analyzed through the field noise test, and the tuning frequency was determined to design a noise reduction device. The noise reduction device was designed to have noise reduction performance of at least 3 dB(A) using the prediction method(2D BEM) and through the laboratory test with the prototype. Finally, the outdoor test showed that this device could decrease noise level of 400 km/h class high-speed railroad even more than 3dB(A).