Eddy current dynamic vibration isolator and vibration isolation method thereof

Abstract

The invention provides an eddy current dynamic vibration isolator and a vibration isolation method thereof. The vibration isolator comprises a spring damping mechanism, an eddy current energy dissipation mechanism, a dynamic vibration absorption mechanism and a magnetorheological damping mechanism; the spring damping mechanism is formed by a nut, a screw, a pressure plate, a bottom plate, an elastic part and the like; the eddy current energy dissipation mechanism is formed by a ring magnet, an eddy current block, a metal anti-magnetic round tube and the like; the dynamic vibration absorption mechanism is formed by the pressure plate, the elastic part, the eddy current block and the like; the magnetorheological damping mechanism is formed by a coil, a metal anti-magnetic round plate, an annular rubber block, magnetorheological fluid, a circular cylinder and the like. The vibration isolation method includes that the eddy current dynamic vibration isolator is arranged under a track boardof a floating-slab track, and vibration isolation is achieved in the steps of vibration isolation by the spring damping mechanism, primary energy consumption by the eddy current energy dissipation mechanism, vibration isolation and energy dissipation by the dynamic vibration absorption mechanism and vibration alleviation by the magnetorheological damping mechanism. By the arrangement of the eddy current dynamic vibration isolator and the vibration isolation method thereof, the purpose of improving the vibration isolation performance of the floating-slab track under the small stiffness load andreducing the maximum vertical displacement of the floating-slab track under the large stiffness load is effectively realized.

Description

technical field [0001] The invention belongs to the technical field of rail transit vibration reduction and noise reduction, and in particular relates to a vortex dynamic vibration-absorbing type vibration isolator applied to a floating slab track and a vibration isolation method thereof. Background technique [0002] At present, among the vibration and noise reduction methods in the urban rail transit industry, the vibration isolation effect of the floating slab track bed vibration isolation system is the most ideal, and it is suitable for high-grade or special vibration reduction areas that require high vibration reduction requirements, such as hospitals, concert halls, etc. Museums, etc., have been widely used in the control of rail traffic vibration and noise. The floating slab ballast bed vibration isolation system isolates the vibration of the track slab from the foundation by setting elastic vibration isolators under the track slab, so as to reduce the environmental v...

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Problems solved by technology

[0003] The stiffness characteristics of existing elastic vibration isolators are all linear stiffness or close to linear stiffness, but in the vibration isolation system of floating slab track-vehicle, the mass of the vibration isolation system will change significantly due to different train loads, which makes the existing The pressure of the floating slab track system varies greatly under different loading conditions, resulting in inconsistent system performance in the state of empty and heavy vehicles, poor vibration isolation performance in the state of empty vehicles, and excessive vertical displacement of the track in the state of heavy vehicles, etc.

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