Floating slab ballast bed with quasi-zero stiffness vibration isolator and its design method

Abstract

The invention discloses a quasi-zero stiffness vibration isolator floating slab track bed. The quasi-zero stiffness vibration isolator floating slab track bed is characterized by comprising floating slabs and vibration isolating assemblies disposed in the floating slabs. The vibration isolating assemblies are arranged in the length direction of the floating slabs at intervals. The vibration isolating assemblies comprise outer sleeves cast in the floating slabs and quasi-zero stiffness vibration isolators installed in the outer sleeves. Heightening gaskets for adjusting the height of the floating slabs are arranged between the quasi-zero stiffness vibration isolators and the outer sleeves in a padded mode, the top portions of the outer sleeves are covered with insulating cover plates. According to the quasi-zero stiffness vibration isolator floating slab track bed, the quasi-zero stiffness vibration isolators are arranged in the floating slab track bed, the bearing capacity and stability of a floating slab track are not affected, and the floating slab track bed has the advantages of high bearing capacity, small deformation capability, good low-frequency vibration isolation effect and large vibration isolation frequency range. The low-frequency vibration component of the floating slab track bed is effectively suppressed, and the low-frequency vibration isolation of the floating slab track is realized. The invention further provides a design method of the quasi-zero stiffness vibration isolator floating slab track bed.

Description

technical field [0001] The invention relates to a floating slab track bed of a quasi-zero stiffness vibration isolator and a design method thereof, which realizes low-frequency vibration isolation of a floating slab track, and belongs to the field of track vibration reduction and noise reduction. Background technique [0002] In recent years, the vibration and noise problems caused by the development of urban rail transit have attracted more and more people's attention. The vibration caused by the wheel-rail interaction is transmitted to the surrounding infrastructure such as tunnels or bridges through the track structure, and then transmitted to the surrounding buildings through the ground, which will have adverse effects on residents, schools, hospitals, office buildings, etc. along the line. At present, among many rail vibration reduction measures, the floating slab rail structure is considered to be the best rail vibration reduction form. However, studies have shown tha...

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Problems solved by technology

[0010] In summary, in the prior art, quasi-zero stiffness vibration isolators have been used in some fields of vibration reduction, but there are no specific application examples in floating slab tracks. Requirements and structural characteristics, use the vibration reduction principle of the quasi-zero stiffness vibration isolator to realize the low-frequency vibration isolation of the floating slab track, and realize the suppression of low-frequency vibration components during the running of the train is the research direction of the present invention

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