Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 29, 2016 - July 01, 2016
Past studies and researches indicate that major aerodynamic sources of Shinkansen noise in the range of 100 to 20k Hz are mainly pantographs, bogies and gaps between cars. However, for the low-frequency aerodynamic sound less than 100Hz the mechanism has been still unknown. This is because it is difficult to identify sound sources and simulate the phenomenon in any experiment. This paper presents how the aerodynamic sound is measured with a train model launching facility at Railway Technical Research Institute. Through the scale model experiment using 1/70 train model, it is shown that the cavities in which a bogie is put generate the aerodynamic sound in the range of 10 to 60 Hz and peaks around 30 Hz. Then, these results are compared with the measurement in the field test and it is found that the aerodynamic noise source is located around the bogie cavities.
