Study on squeal noise generated on railway curved section using the two-disc test rig

(Experimental part)

Abstract

In order to investigate the characteristics of curve squeal, a scale model test was performed using an improved experimental apparatus that made it possible to measure the vibration characteristics on a rail disc. It is found that dominant vibration modes of all rail discs are equivalent to those of the wheel disc. Also, the vibration of both discs tends to be intense depending on the diameter of rail discs. In addition, the vibration of a wheel disc related to the squeal noise is attenuated due to damping sheets attached to a rail disc. These would suggest that suppressing the vibration of rail and changing its vibration characteristics are effective in reducing wheel vibration and noise associated with the squeal.