正圧によって作られた負の圧力勾配を利用するトンネル圧力波のアクティブ制御

概要

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When a high speed train enters into a long tunnel, a tunnel pressure wave occurs. When the tunnel pressure wave propagates and approaches the tunnel exit, low frequency noise radiates form the exit and causes vibration of residential dwellings. Based on a model experimental system, this paper proposes an original way to attenuate positive pressure gradient of tunnel pressure wave with a negative pressure gradient generated by positive pressure and discusses how to realize it. Computational simulation indicated that attenuation of the positive gradient of tunnel pressure wave due to the negaitve pressure gradient of positive pressure is effective.
社団法人日本音響学会の論文