Simulation Research on Windscreen Noise Control Technology of High-Speed Train

Abstract

With the increasing speed of high-speed trains in recent years, the problem of aerodynamic noise is becoming more and more serious, and it is particularly important to design noise reduction for the workshop-connected windscreen, which is the main aerodynamic noise source of trains. Through real vehicle noise tests, the noise conditions inside and outside the vehicle in the windscreen area are clarified; a fluid simulation model containing the windscreen area and an acoustic simulation model between the inner and outer windscreen cavities are established, the surface dipole sound source in the windscreen area is obtained using LES large vortex simulation, and the noise reduction effect inside the inner and outer windscreen cavities is studied by simulation after adding sound-absorbing materials to the end walls.