Embedded track dynamic vibration absorber

Abstract

The invention discloses an embedded rail dynamic vibration absorber which comprises elastic units, mass units and damping units which are arranged on the two sides of the rail web of a steel rail, thetops of the elastic units are open, side faces of the elastic units make contact with the rail web and side wings at the bottom of the steel rail, and the elastic units are filled with the multiple mass units distributed discretely. The multiple mass units are solidified after being filled with liquid rubber, the upper surfaces of the solidified mass units are flush with the two side walls of theelastic units, point contact exists between the adjacent mass units, and the damping units are attached to the upper surfaces, solidified through the liquid rubber, of the elastic units and the sidefaces, not making contact with the steel rail, of the elastic units. According to the dynamic vibration absorber, the discrete mass units are solidified in the elastic units through the liquid rubber,the point contact between the steel balls is guaranteed, and meanwhile the frequency ratio and the mass ratio are guaranteed. The embedded rail dynamic vibration absorber is simple in structure, goodin vibration and noise reduction effect, stable in performance and wider in application frequency domain range, meanwhile, the steel rail corrugation is reduced, and the service life of the steel rail is prolonged.

Description

technical field [0001] The invention relates to a dynamic vibration absorber, in particular to an embedded rail dynamic vibration absorber. Background technique [0002] With the rapid development of the economy and the acceleration of urbanization, urban rail transit has also entered a period of great development. The rapid development of rail transit has relieved the pressure of urban traffic and promoted the development of the city, but it has also brought some problems, especially the problem of noise. There are various sources of noise when rail trains are running, mainly including wheel-rail noise, starting and braking noise, noise generated by compressor intake and exhaust, pantograph noise, air-conditioning, ventilation equipment noise, traction noise, rail train horn, Loudspeaker system noise, etc. Among them, the most influential noise sources are traction noise, wheel-rail noise and braking noise. In the construction of urban rail transit, the running speed of ra...

AI Technical Summary

Problems solved by technology

However, it has been found in engineering applications that because the existing technical solutions generally use elastic materials such as rubber to make elastic elements, and then build mass blocks in the elastic elements, this method does not consider the natural frequency ratio (α) on the vibration of the main system inhibitory effect of

In addition, this type of device is only composed of mass and rubber-like elastic materials. Unlike a dynamic vibration absorber, after the vibration is amplified through the resonance of the auxiliary vibration system, the vibration energy is absorbed by damping, so the vibration suppression effect will be reduced.

A rail vibration absorber disclosed in Patent Application No. 201310287329.6 includes a connecting frame made to conform to the shape of the non-working surface of the rail. The connecting frame contains at least one vibration-absorbing cavity. The installation coupling layer needs to be coated between the connecting frame and the non-working surface of the rail, rather than the mass-spring system directly coupled with the rail for vibration absorption, which may cause the design vibration absorption frequency to be inconsistent with the actual operating frequency

The dynamic vibration absorber disclosed by me in the patent application number 201921890225.3 is composed of elastic elements such as auxiliary mass blocks, metal springs, damping materials and fasteners. The elastic elements are easy to install and flexible, and can meet the installation requirements under different conditions. , can form a multi-degree-of-freedom vibration-absorbing structure and other advantages, but there is also the problem of insufficient consideration of the natural frequency ratio

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