Low Frequency Aerodynamic Noise from High Speed Trains

Toki UDA, Toshiki KITAGAWA, Sanetoshi SAITO, Yusuke WAKABAYASHI
2018 Quarterly Report of RTRI  
Yusuke WAKABAYASHI East Japan Railway Company Aerodynamic and bridge noise originate from pressure fluctuations generated by highspeed trains in open sections without tunnels. In this study, field tests using a linear microphone array were conducted in order to clarify low-frequency aerodynamic sources of noise below 100 Hz. In addition, a scale-model experiment using a launching facility for a model train was carried out to simulate actual aerodynamic noise and investigate low-noise bogie
more » ... ow-noise bogie cavity designs. Through these tests, the bogie cavities under the train body were identified as being one of the major sources of aerodynamic noise. It was also found out that rounding cavity edges could be an effective measure to reduce low-frequency aerodynamic noise.
doi:10.2219/rtriqr.59.2_109 fatcat:yvm2pntqh5bizhecsgjuuiyamu