Calculation method of interior aerodynamic noises with middle and high frequencies for high-speed train

The external unsteady flow field of high-speed train was calculated by using SST k-w turbulence model, and the fluctuating pressure of body surface was extracted. Based on the statistical energy analysis(SEA) theory, the analysis model of interior aerodynamic noises with middle and high frequencies for high-speed train was established, the parameters of each subsystem in the model were determined, and the interior aerodynamic noise induced by external fluctuating pressure was calculated. Calculation result shows that the change of fluctuating pressure on the head car of high-speed train is most dramatic. For middle and high frequencies, the sound pressure levels of cab and passenger room decrease with the increasing of frequency. When frequency is 0.5 kHz, the maximum sound pressure level of cab is 93.79 dB, and the maximum sound pressure level of passenger room is 81. 99 dB. For each frequency, the maximum difference of sound pressure levels for the three cavities of cab is 3. 89 dB. The maximum difference of sound pressure levels of the three cavities of passenger room is 8.69 dB. The sound pressure level of cab is larger than that of passenger room, the sound pressure level of the middle cavity of cab is largest, and the main energy inputs of middle cavity of cab are from window and floor. The interior aerodynamic noise can reduce through the effective design of window and improving the interior sound-absorbing performance of hig-speed train.