Predicting Train Noise Radiation on Elevated Viaduct and Its Application
Zhang Haibin;Wan Quan;Jiang Weikang
Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (11) : 21-24.
Predicting Train Noise Radiation on Elevated Viaduct and Its Application
The traffic jams in cities are an important problem affecting the city's operation. Modern urban mass transit is an effective solution to alleviate the traffic jams, one of which is the elevated viaduct rail transit. Elevated viaduct brings along with the noise pollution, which seriously disturbs people’s lives in the community nearby and should be controlled. The establishment of a model can predict the traffic noise radiation and evaluate its impact to the places along the elevated viaduct. It helps to optimize the design of the elevated viaduct and lower the noise disturb. The train noise profile is modeled by assuming the train noise to be a line with constant power per unit length. Both monopole and dipole directivity are employed to describe the spread of train noise. The experiment was done to illustrate the validity of models. These two models are suitable to the different cases. This work provides a reference for predicting the train noise radiation on the elevated viaducts.
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