nalysis of Low frequency Noise Emitted from High-speed Train with Fluid Model

高速列车低频噪声的流体模型分析

基本信息

批准号：
11650543
负责人：
YAMADA Shinji
金额：
$ 2.05万
依托单位：
Yamanashi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650543/
关键词：
Hgh-speed train Low frequency noise Yamanashi maglev test line Tunnel entrance hood Potential flow model トンネル

项目摘要

A low frequency noise emitted from a high-speed train was measured at the Yamanashi maglev test line. Sound attenuation with distance, increase of sound level with train speed and influences of a tunnel entrance (hood) on low frequency noise were investigated.Experiments on low frequency noise generation with a 1/100 high-speed train model at a laboratory were carried out. Sound attenuation with distance, and increase of sound level with train speed were measured. These characteristics are accorded to the measurements of the Yamanashi maglev test line.It was shown that a numerical analysis of the low frequency noise generated by a high-speed train was done with a potential flow model around a high-speed train. The increase of sound level with train speed can be explained mathematically from the fluid model. The sound attenuation with distance, the sound level with train length and the frequency characteristics with distance are explained by numerical simulation.It was shown that a nume … More rical analysis of the low frequency noise generated by a high-speed train was done with a potential flow model around a high-speed train. The increase of sound level with train speed can be explained mathematically from the fluid model. The sound attenuation with distance, the sound level with train length and the frequency characteristics with distance are explained by numerical simulation.It was shown that a numerical analysis of the low frequency noise generated by a high-speed train was done with a potential flow model around a high-speed train. The increase of sound level with train speed can be explained mathematically from the fluid model. The sound attenuation with distance, the sound level with train length and the frequency characteristics with distance are explained by numerical simulation.The influence of a tunnel entrance on the low frequency noise was examined with the model train experimental equipment. A tunnel entrance increases the level of low frequency noise around the tunnel entrance.The level of low frequency noise generated bye the high-speed train can be predicted with these results Less

在Yamanashi Maglev测试线上测量了从高速列车发出的低频噪声。投资了声音衰减，距离降低距离，随着火车速度增加声音水平以及隧道入口（HOOD）对低频噪声的影响。在实验室进行了1/100高速度训练模型的低频噪声产生。测量了距离衰减的声音衰减，并测量了火车速度的声音水平的增加。这些特征是根据Yamanashi Maglev测试线的测量值进行的。这表明对高速列车产生的低频噪声进行了数值分析，并在高速列车周围使用了潜在的流量模型。可以通过流体模型来数学解释声速的增加。具有距离的声音衰减，带有火车长度和距离的频率特征的声音级别通过数值模拟来解释。显示了一个数字……对高速列车产生的低频噪声进行了更详细的分析，该分析是通过高速列车周围的潜在流量模型完成的。可以通过流体模型来数学解释声速的增加。具有距离的声音衰减，带有火车长度和距离频率特性的声音级别通过数值模拟来解释。这表明，对高速列车产生的低频噪声的数值分析是通过高速列车周围的潜在流量模型完成的。可以通过流体模型来数学解释声速的增加。具有距离的声音衰减，带有火车长度和距离频率特征的声音级别通过数值模拟来解释。使用模型列车实验设备检查了隧道入口对低频噪声的影响。隧道入口增加了隧道入口周围低频噪声的水平。通过这些结果可以预测高速列车产生的低频噪声水平