A Study on the Characteristics and Prediction Method of Noise from Concrete Railway Bridge

초록

When it comes to railway passing through the urban area, structure born noise from the structure supporting the track serves the secondary noise source, worsening the am-bient noise. Noise on bridge is greater than at-grade section by more than 3dB, requiring in-vestigation of noise propagation by type of structure and countermeasures urgently. The study thus is intended to investigate the characteristics of the noise generated by the train passing the concrete bridge which is very common and analyze the result by distance, type of train and speed so as to establish the countermeasure to reduce the noise around railway bridge. Measured noise data was used to develop the simple equation for predicting the noise through regression analysis. Acoustic modeling of the topography was carried out to input Mithra, the railway noise prediction analysis program and noise prediction was compared with measured value to determine the possibility and feasibility of noise prediction from the software aspect.