Abstract
For the conventional narrow-gauge railway lines, the noise generated by railway vehicles mainly consists of rolling noise and traction-motor fan noise. The rolling noise relatively has greater contribution to the total noise than before by the introduction of new traction-motor fan. In this paper, the vibratory characteristics of wheels, which is important factor of the rolling noise have mainly focused on and investigated by both field tests and numerical analyses. In the field test, the modal parameters for three types of wheel are obtained. By varying the wheel web geometry, the dependence on the vibratory parameters is examined through the numerical analyses. Through the studies, it is found that the web geometry has a great influence on the radial modes. The thickness of the web affects 1-nodal-circle axial modes. The tyre region is important for O-nodal-circle axial vibration with higher order modes.
