A study for alternative technique of porous material aimed at aerodynamic noise reduction of pantograph head support

Abstract

Reduction in aerodynamic noise emitted from a pantograph is an important subject for reducing environmental impact and speed-up of high-speed trains. In the previous study, aerodynamic noise reduction method by smoothing pantograph head cross section and applying porous material to pantograph head support were proposed. In this study, to develop an easier applicable technique, two methods of substituting porous material with plate with channels or perforated plate are investigated. From a wind tunnel test result, it is clarified that both methods can reduce aerodynamic noise significantly.