The steel spring floating plate track has a significant damping effect on conventional frequency band vibrations above 20Hz, but its damping effect is not ideal for low-frequency subway vibrations, and vibration amplification may even occur in the low-frequency band. The power absorber can absorb and amplify the low-frequency vibration of the floating slab track bed through its resonance system composed of mass and spring, and finally consume it in its damping element, achieving a good effect of suppressing low-frequency vibration of the track board, which is conducive to the vibration response control of the vertical low-frequency vibration of the floating slab track.
2. Composition and principle of nonlinear dynamic vibration absorbers
The nonlinear dynamic vibration absorber consists of a skeleton steel cage, lifting sleeve, concrete, elastic pad, and other parts.
