To provide a soundproofing method for a railroad wheel constituted of a rim adapted to roll arm a rail, a wheel core and a hub, which attenuates noises emitted from such a wheel rolling of a wide-ranging frequency band, especially of a frequency band substantially lower than the vibration frequency band that known soundproofing devices in the prior art reliably attenuate.
The natural radial and axial vibration modes of a wheel 6 are defined from calculation or experiment, and the resonance frequency of the wheel is decided with respect to the defined vibration modes. At least one dynamic vibrator 10a or 10b is fixed on the wheel. The dynamic vibrator 10a or 10b comprises an active mass part 11a or 11b of which mass part has a value which exhibits a desired effect on the mass part of at least a part of the wheel 6 to which the dynamic vibrator is joined by means of an elastic element 12a or 12b. The dynamic vibrator is manufactured and controlled so as to have a natural frequency equal to the resonance frequency of the wheel with respect to the defined vibration modes.
COBLENTZ ARNAUD
DEMILLY FRANCOIS
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