Noise-absorbing device for railway vehicle wheel and associated railway vehicle wheel
A noise-absorbing device for a railway vehicle wheel includes: at least one strip extending radially from a connecting end capable of being fastened to the periphery of the wheel, to a free end; and at least one damping mass fastened on a face of the free end of the strip, away from the connecting end. The strip includes at least two metal or composite layers and at least one layer of viscoelastic material gripped between the two or composite metal layers.
1. A noise-absorbing device for a railway vehicle wheel, comprising:
at least one strip extending radially from a connecting end capable of being fastened to the periphery of the wheel, to a free end,
at least one damping mass fastened on a face of the free end of the strip, away from the connecting end,
wherein the strip includes at least two metal or composite layers and at least one layer of viscoelastic material gripped between the two metal or composite layers.
2. The noise-absorbing device according to claim 1 , wherein the at least one strip comprises at least one radial slit located at a free end of the strip, the at least one radial slit delimiting a plurality of radial branches, each radial branch bearing at least one damping mass fastened on a free end of the radial branch.
3. The noise-absorbing device according to claim 2 , wherein the at least one damping mass of each radial branch has a different mass and/or a different position on the free end of the strip, from one radial branch to another.
4. The noise-absorbing device according to claim 1 , wherein the device includes two parallel strips fastened to one another at connecting ends thereof, each strip including at least two parallel metal or composite layers and at least one layer of viscoelastic material gripped between the two metal or composite layers.
5. The noise-absorbing device according to claim 1 , wherein the device is in the form of an annular sector.
6. The noise-absorbing device according to claim 1 , wherein the thickness of the viscoelastic layer is comprised between 0.05 mm and 2 mm.
7. The noise-absorbing device according to claim 1 , wherein the damping mass is fastened away from the connecting end of the strip, freeing an annular space for free movement of the strip.
8. A wheel for a railway vehicle comprising at least one noise-absorbing device according to claim 1 .
9. The wheel for a railway vehicle according to claim 8 , wherein the wheel comprises a plurality of the noise-absorbing devices, the thickness of the strip of at least one of the noise-absorbing devices being different from that of another of the noise-absorbing devices.
10. The wheel for a railway vehicle according to claim 8 , wherein the wheel comprises a plurality of the noise-absorbing devices, distributed on the periphery of the wheel.
11. The wheel for a railway vehicle according to claim 10 , wherein at least one passage is reserved between the noise-absorbing devices for the passage of shunt cables.