Prediction of the Environmental Noise Level of Railway Cars Crossing a Concrete Bridge

Seungho Jang

doi:10.7776/ASK.2015.34.1.052

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2015 Vol.34, Issue 1 Preview Page Next Page

Prediction of the Environmental Noise Level of Railway Cars Crossing a Concrete Bridge 콘크리트교를 지나는 철도 차량의 환경 소음 예측 연구

31 January 2015. pp. 52-59

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Abstract

In the conventional model for the prediction of the railway environmental noise, one used an empirical formula of the total noise level at specific distances. Only a function of the distance to the source was also used to calculate the noise level near the railway bridges. However, the noise varies depending on the position of the receiver as well as the distance from the source especially at concrete bridges. In this paper, a noise propagation model in the railway concrete bridge was derived by considering the diffraction at the bridge deck and the ground effect and applying the ISO 9613-2 noise propagation model. We compared the predicted and measured values of environmental noise at a high-speed railway bridge, and it was confirmed that this prediction model gives relatively small errors.

Keywords

Railway noise

Bridge noise

Environmental noise prediction

Pass-by noise level

Noise source model

국내 철도의 환경 소음 예측을 위해서 기존에는 총합 소음도의 거리별 경험식에 기초한 모델을 이용하였던 바, 교량 주변 소음도를 계산하는 데에도 거리만의 함수를 이용하였다. 그러나 콘크리트교에서는 수음점의 거리뿐만 아니라 위치에 따라서도 소음도가 변화한다. 본 논문에서는 철도 콘크리트교에서 교량 상판에 의한 회절 및 지면 효과를 고려한 소음전파 예측모델을 도출하였으며, 이때 ISO 9613-2의 소음 전파 모델을 이용하였다. 고속철도 콘크리트교 주변 소음도에 대한 예측값을 실제 측정결과와 비교하였으며, 그 결과 본 예측 모델이 비교적 작은 오차를 냄을 확인하였다.

키워드

철도 소음

교량 소음

환경 소음 예측

통과 소음도

소음원 모델

References

1.ISO 9613-2, Acoustics - Attenuation of sound during propagation outdoors - Part 2: General method of calculation, 1996.

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 34
No :1
Pages :52-59
Received Date : 2014-09-12
Revised Date : 2014-10-21
Accepted Date : 2014-11-07
DOI :https://doi.org/10.7776/ASK.2015.34.1.052

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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