Abstract
A new type of tuned mass damper has been developed to reduce rail vibration and noise radiation. The damper comprises multiple masses oscillating along the shear direction of resilient layers forming a multiple mass-—spring system. It provides effective broadband damping for a frequency range between 300Hz and 2500Hz. The resilient layers are aligned perpendicularly to the rail alignment such that each mass is allowed to oscillate in both vertical and lateral directions. The natural frequencies of the oscillating masses are individually tuned to match the rail vibration at multiple frequencies to cover both vertical and lateral pinned-—pinned resonance frequencies of the rail.
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