PAPERS |
Yuichi KOZUMA, Toshiki KITAGAWA, Kiyoshi NAGAKURA
For the narrow-gauge railway lines, the noise generated by railway vehicles mainly consists of rolling noise and traction-motor fan noise. The introduction of a new traction-motor has led to the reduction of the fan noise. As the result, the contribution of the rolling noise to the total noise has become more dominant than before. In this paper, the vibratory characteristics of the wheels, which are the major important factors of the rolling noise, have been mainly focused on and investigated by both field tests and numerical analyses. Through the studies, it has been found out that the web geometry has a great influence on the modal behaviour, especially in radial modes.
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