Experimental Study on Low-frequency Aeroacoustic Sound Using Launch Facility for Train Model

(2nd Report, Experiments of Train Model with Bogie)

Abstract

It is known that bogie cavities of Shinkansen trains are major aeroacoustic sound sources of low-frequency noise, which is difficult to insulate with noise barrier. In this paper, an experimental facility that can launch a train model at high velocities is used to investigate the low-frequency noise sources. 1/33.1 scale train model with 6 bogies (4-car train model) are used .The comparative study of flat, bogie cavities and bogies with side covers shows that bogie cavities generate low-frequency aeroacoustic sound, and full-height side covers reduce that sound effectively, compared with half-height side covers .