Characteristics of nonlinear effects on the propagating compression wave in a tunnel

Tomo Orita, Toshiyuki Aoki, Shinsuke Ishii, Daisuke Sasa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A compression wave is generated ahead of a high-speed train, while entering a tunnel. This compression wave propagates to the tunnel exit and spouts out as a micro pressure wave, causing an exploding sound. In order to estimate the magnitude correctly, the mechanism of the attenuation and distortion of a compression wave propagating along a tunnel must be understood and experimental information on these phenomena is required. An experimental and numerical investigation is carried out to clarify the nonlinear effect of the propagating compression wave in a tube. The attenuation and distortion of compression wavefront are affected by nonlinear effects on the propagating compression wave in a tunnel. It is confirmed that a head of wavefront and an overshoot on pressure distribution is observed behind a compression wave due to the transition of the unsteady boundary layer.

Original languageEnglish
Title of host publication40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Pages1016-1021
Number of pages6
Publication statusPublished - 2011
Event40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan
Duration: Sep 4 2011Sep 7 2011

Publication series

Name40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Volume2

Other

Other40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
CountryJapan
CityOsaka
Period9/4/119/7/11

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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