Testing Study On Noise Of High-speed Railway Tunnel

As the backbone of our transportation, the railways always play the important role in the national economy. In recent years, the railways have been developing rapidly, especially in high-speed trains. With the development of high-speed railways, a number of tunnel engineering was built. When high-speed trains through a tunnel, it will generate reverberation lasts for a long time in tunnel and the noise is increased, which can be harmful to passengers in the train. Acoustic energy travels forward in tunnel, then it will radiate to the exit of the tunnel, which causes the noise increased rapidly. In order to realize safe, comfortable, tow energy consumption and meet the requirements of environmental protection of high-speed trains, we must make a deep study on noise characteristics of high-speed trains passing tunnels, which can provide the basis for related technical measures.hi this paper, noise distribution characteristics were emulated by the acoustic simulation software RAYNOISE in tunnel and the exit of tunneL Meanwhile, some realistic programs were presented. Based on these programs, field test have been done. During the railway debugging, the noise data of different models and different line conditions, different speed grades have been collected when trains passing tunneL At last, noise characteristics can be obtained by processing the experimental data, such as spectral characteristics, noise distribution, the relationship of noise value between inside tunnel and outside tunnel and so oa This also provides a firm basement for the following research of the noise control.