Control of Tunnel Pressure Wave with Positive Pressure

正压隧道压力波控制

• 批准号: 07555166
• 负责人: YAMADA Shinji
• 金额: $ 0.64万
• 依托单位: Yamanashi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555166/
• 关键词: Pressure wave; Traveling wave; Shinkansen; Active control; Positive pressure; 正圧; Pressure wave; Traveling wave; Shinkansen; Active control; Positive pressure; 正圧

When a high speed train enters into a long tunnel, a tunnel pressure wave occurs in front of the train. The pressure wave propagates at sound velocity to tunnel exit and radiates as an impulsive low frequency noise called as tunnel pressure wave from the tunnel exit. Based on a model experimental system, this study try an original way to attenuate positive pressure gradient of tunnel pressure wave with a negative pressure gradient generated by positive pressure and researches an effect of positive pressure wave on the tunnel pressure wave.

当高速火车进入长隧道时，隧道压力波就会在火车前面发生。压力波以声速传播到隧道出口并辐射为冲动的低频噪声，称为隧道出口的隧道压力波。基于模型实验系统，本研究尝试一种原始方法来减轻隧道压力波的正压梯度，其正压梯度由正压产生，并研究正压波对隧道压力波的影响。