A high-speed train entering a tunnel generates compression and expansion waves inside the tunnel, which are propagated through the tunnel. In addition, the entering train generates negative and positive impulsive waves outside the tunnel, which are radiated directly from the entrance portal to the surroundings (tunnel entry wave). Experiments have been conducted on the tunnel entry wave by using a scale model of simple geometry under the conditions that the maximum entry speed is over 400 km/h. The experimental results are compared with the theoretical results obtained by Howe and are found to be in good agreement in regard to the waveform, speed dependency and directivity.
Characteristics of the pressure wave radiated from an entrance portal when a train enters a tunnel
2001
7 Seiten, 12 Quellen
Conference paper
English
Early-warning method used when high-speed train enters tunnel
European Patent Office | 2016
|On the infrasound generated when a train enters a tunnel
Tema Archive | 2003
|The theory of the compression wave generated when a high-speed train enters a tunnel
British Library Online Contents | 1999
|