Abstract
For further speed-up of Shinkansen, reduction of aeroacoustic noise generated by a pantograph has been an important subject of discussion. In particular, a panhead significantly influences the aeroacoustic characteristics of the pantograph. The dipole noise generated by the panhead can be evaluated by using Howe's vortex sound theory from flow field quantities obtained by numerical simulation. This paper describes the method to evaluate contributions of dipole noise source around the panhead toward the dipole noise observed at the far field. Visualizing the contributions of dipole noise source around the panhead can shows the dipole noise source structure around the panhead.
