Abstract
Noise reduction along a railway line is very important for further speed-up of a high-speed train. In particular, the aerodynamic noise caused by a pantograph is one of the main noise sources, therefore it has become increasingly important to reduce the foregoing noise. As one method for aerodynamic noise reduction, installation of porous metal which covers an object surface was proposed before. According to some wind tunnel test results, the aerodynamic noise reduction effect by this method was verified and it has been clarified that this method is effective for high-speed pantographs. A field test shows that installation of porous metal is effective in reducing the aerodynamic noise of a high-speed pantograph. These test results are described in this paper.
