A study on aerodynamic noise reduction effect of pantograph head support by applying perforated plates to ridge corners

Abstract

Reduction in aerodynamic noise emitted from a pantograph is an important subject for reducing environmental impact of high-speed trains. In the previous study, aerodynamic noise reduction method of pantograph head support by applying perforated plates to ridge corners was proposed. In this study, relation between inner and outer shape of perforated plates and aerodynamic noise reduction effect is investigated. From a wind tunnel test result, it is clarified that setting appropriate inner and outer shape of perforated plates can reduce aerodynamic noise to the same extent as applying porous material.