Rail system

Abstract

The invention provides a rail system. The rail system comprises a floating plate, supporting rail tables, fastening assemblies, steel rails and a vibration isolator with high hydrostatic pressure and low dynamic stiffness characteristic, wherein the supporting rail tables are poured on the floating plate; the steel rails are fixed on the supporting rail tables through the buckle assemblies; a positive stiffness assembly of the vibration isolator comprises a seat body and first elastic parts arranged in a cavity of the seat body, and the bottom of the seat body is arranged on a base; a supporting part abuts against the upper ends of the first elastic parts; floating parts are poured in the floating plate, and a gap is formed between the floating plate and the base; a negative stiffness assembly comprises elastic parts and bearing parts which are mutually matched, the elastic parts are connected to the supporting part and / or the floating parts, and the bearing parts are connected to the seat body; when the floating parts bear load, the direction of acting force, applied to the bearing parts, by the elastic parts is set in an inclined mode or perpendicularly relative to the direction of elastic force of the first elastic parts. With the adoption of the technical scheme, the rail system can improve vibration isolating frequency range and low-frequency vibration damping effect of the vibration isolator and the rail system, and controls dynamic displacement while a train passes through the rail system.

Description

technical field [0001] The invention relates to the technical field of vibration reduction and noise reduction of a track system, in particular to a track system. Background technique [0002] Low-frequency vibration isolation of rail systems is a major research hotspot and difficulty in the field of rail transit vibration isolation. Structural vibration control can be divided into passive control, active control, semi-active control and hybrid control according to whether external energy input is required. Active control vibration isolation and semi-active control vibration isolation technologies are used to isolate low-frequency vibrations well, but their structures are complex. , takes up a lot of space, has high manufacturing costs, requires external energy, and has problems such as instability and electromagnetic pollution. In contrast, the traditional passive vibration isolation structure is simple, easy to implement, reliable, and does not consume extra external ener...

AI Technical Summary

Problems solved by technology

When choosing to increase the system damping, the damping ratio increases, and the maximum transmissibility corresponding to the resonant frequency decreases, but its transmissibility in the high frequency band increases; when the system stiffness is decreased, the natural frequency decreases Small, the initial frequency of vibration isolation decreases and the range of vibration isolation frequency increases, but its static bearing capacity decreases and static deformation increases

Therefore, for the traditional linear vibration isolation system, it is impossible to obtain a lower initial frequency of vibration isolation and a higher static bearing capacity at the same time, and the two are contradictory to each other.

This is also the main reason why the above-mentioned rail transit vibration reduction measures have poor vibration reduction effects at low frequencies.

[0004] Therefore, the vibration isolation frequency range of the existing track system is narrow, and it is necessary to design a track system that can effectively isolate low-frequency vibration and control the dynamic displacement of the track at the same time for low-frequency vibration isolation in rail transportation or other fields.

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