Abstract
The noise of narrow-gauge vehicles is composed of rolling noise, electric apparatus noise and driving system noise. In recent years, the total noise tends to increase with speed up. The noises radiated from electric apparatus and the driving system tend to decrease, however, the rolling noise tends to increase relatively. This paper reports the characteristics of sound radiation obtained from BEM analysis and bench experiments of wheels with different web shapes, or webs of corrugated and straight standard types, which are used for narrow-gauge railway vehicles. We found that the noise of NA-type corrugated wheel is the highest value in four kinds of wheels which we experimented on,and the typical frequency of the main modes is 1257Hz.
