Vibration Reduction of a Railway Wheel by Cantilever-Type Dynamic Absorbers : Optimal Adjustment of Absorbers and Experiment

Abstract

In this paper, the optimal tuning of the natural frequency and the optimal damping parameter of a cantilever-type dynamic vibration absorber attached to a railway wheel are derived. An index, the equivalent mass ratio, with which the effectiveness of absorbers can be estimated and evaluated easily, is defined. It is found that the cantilever-type absorber can be more effective than the conventional mass-spring absorber. When N absorbers are attached to a wheel and N/2 is different form the number of nodal diameters, the effectiveness of the vibration reduction does not decrease, even though the wheel is rotating.