構内試験線の曲線区間で発生するきしり音の音源別寄与度評価

抄録

Measurements and theoretical studies related to wheel/rail noise have been carried out widely and thoroughly. The wheel/rail noise from 250 Hz to 4 kHz significantly influences the wayside noise along railway lines. However, when a train runs on a sharply curved track, squeal noise due to wheel and rail interactions in the frequency range of 1 kHz to 8 kHz has greater contribution to the total wayside noise. In this paper, field tests in RTRI’s test line were carried out in order to understand the characteristics of squeal noise. In this paper, the contribution of the wheel and rail radiations to squeal noise are investigated by using the measurement results of wheel and rail vibrations and wayside noise. It is found that the dominant noise source is inside leading wheel in 2 kHz at the speed of up to about 30 km/h. Furthermore, it is found that the rail noise has lower contribution to squeal noise.