Small model experiment on the gradient of pressure wave formed by train entering into the tunnel at 160km/h

Temma Yonemoto; Hirokazu Endo; Fumiya Meguro; Masanori Ota; Kazuo Maeno

doi:10.1117/12.2054310

2 June 2014 Small model experiment on the gradient of pressure wave formed by train entering into the tunnel at 160km/h

Temma Yonemoto, Hirokazu Endo, Fumiya Meguro, Masanori Ota, Kazuo Maeno

Proceedings Volume 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics; 92340F (2014) https://doi.org/10.1117/12.2054310
Event: International Conference on Experimental Mechanics 2013 and the Twelfth Asian Conference on Experimental Mechanics, 2013, Bangkok, Thailand

Abstract

In recent years, running speed of the trains of conventional lines becomes faster with improving vehicle and rail performance. At the high-speed range compression wave is formed when a high speed train enters a tunnel. This compression wave propagates in the tunnel at the speed of sound. This propagated wave is called "tunnel pressure wave". In some cases, when the station of conventional lines is located in the tunnel, problems such as breaking the window glass have been reported by the tunnel pressure wave at the station. Though the research on pressure wave inside the tunnel of the Shinkansen has been widely studied in connection with "tunnel micro-pressure wave” problems, the number of research reports on the operating speed of conventional lines(130～160km/h) is insufficient. In this study we focused on Hokuhoku line which has maximum operating speed of conventional lines in Japan (160km/h), and we performed the experiment on the gradient of the pressure wave by using diaphragmless driver acceleration system, small train nose model, and tunnel model of the limited express of Hokuhoku line. We have performed the pressure-time variation measurement on the tunnel model, including a station model or signal crossing station [SCS] model. As the thpical train model, we used Streamline-type or Gangway-type for train nose geometry. We have obtained pressure gradient data on several running conditions and observed the temporal .behavior in the tunnel pressure wave. As a result, we clarified large difference in pressure gradient with the train nose geometry and with the cross-sectional area of the tunnel.

Citation Download Citation

Temma Yonemoto, Hirokazu Endo, Fumiya Meguro, Masanori Ota, and Kazuo Maeno "Small model experiment on the gradient of pressure wave formed by train entering into the tunnel at 160km/h", Proc. SPIE 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics, 92340F (2 June 2014); https://doi.org/10.1117/12.2054310

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KEYWORDS

Nose

Wave propagation

Data modeling

Instrument modeling

Experimental mechanics

Glasses

Current controlled current source

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