Reduction of Aerodynamic Noise Emitted from Pantograph by Applying Multi-Segmented Smooth Profile Pantograph Head and Low Noise Pantograph Head Support
摘要
Reducing aerodynamic noise emitted from a pantograph head and its support, which are the pantographs’ dominant aerodynamic noise sources, is among the key environmental challenges facing the further acceleration of high-speed trains. This paper shows three aerodynamic noise reduction strategies applicable to actual trains: applying multi-segmented smooth-profile pantograph head, shape improvement of the pantograph head support, and covering of the pantograph head support with a layer of porous material. Wind tunnel tests confirmed that aerodynamic noise can be reduced by 2.7 dB compared to pantographs in current use by applying these strategies.