Characteristics of a compression wave propagating over porous plate wall in a high-speed railway tunnel

T. Aoki, J. Yamamoto, K. Nagatani

Research output: Contribution to journalArticle

Abstract

A pressure wave is generated ahead of a high-speed train, while entering a tunnel. This pressure wave propagates to the tunnel exit and spouts as a micro-pressure wave, which causes an exploding sound. From the fact that the ballast track tunnel has smaller noise than the slab track tunnel, we have suggested a new inner tunnel model to decrease the noise of the micro-pressure wave, using the ballast effect. Experimental and numerical investigations are carried out to clarify the attenuation and distortion of propagating compression wave over porous plate wall in a model tunnel. Data shows that the strength of the compression wave and a maximum pressure gradient of the compression wave was weakened. These data shows the possibility of the present alleviative method using the porous plate wall in a tunnel.

Original languageEnglish
Pages (from-to)218-223
Number of pages6
JournalJournal of Thermal Science
Volume17
Issue number3
DOIs
Publication statusPublished - Sep 2008

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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