Study on Characteristics of the External Aerodynamic Noise of High-Speed Trains

The on-line experiments were carried out to illustrate that it is reasonable to simplify the high-speed train model. The turbulent air flow of the train model was simulated, and the far-field aerodynamic noise generated by high-speed trains was predicted. It was found that reasonably shortening the car body will not influence the distribution of the sound power level generated by the train surface. The aerodynamic noise of high-speed trains is a typical broadband noise in a wide frequency scope(0~5 000 Hz), the simulated aerodynamic noise agrees well with the measurement, and the simulation method is reliable. The turbulence is most severe at the bogie, followed by the nose cone. The air flow on the body surface is most gentle, further confirming the rationality of shortening the train model. The simulation method proposed can provide a basis for structural optimization design of high-speed trains and verify the effectiveness of the aerodynamic noise control method for high-speed trains. © 2020, Editorial Department of Journal of Northeastern University. All right reserved.