Design and structure of self-locking type rail base dynamic vibration absorber

Abstract

The invention discloses the design and a structure for a self-lock type rail bottom dynamic vibration absorber. An elastic element (3) is paved under a steel rail (1); the middle part of the elastic element is buried with one or more resonant mass blocks (4, 5) in an adhesion mode or an non-adhesion mode; the mass and the distribution positions of the resonant mass blocks are optimized according to the maximum vibration-absorbing amplitude; the elastic element and the resonant mass blocks form a multi-mode dynamic resonant mass-spring unit; and a self-lock type magazine clip (2) passes through the elastic element along the vertical direction of the steel rail and then is clamped at side edges of both ends of a rail root of the steel rail to firmly lock the elastic element on the bottom of the steel rail; when the steel rail vibrates, the dynamic resonant mass-spring unit produces the resonance, thereby realizing the suppression to the vibration of the steel rail and the transfer and absorption to vibration energy, attenuating the amplitude of the steel rail, and reducing the noise radiation of the steel rail caused by the vibration; at the same time, the design can also inhibit the generation and increase of the waviness corresponding to resonant frequency bands of the wave of the steel rail, thereby controlling the excitation of the waviness of the steel rail to a wheel rail and the produced vibration and noise, reducing the action force of the wheel rail, and increasing the riding comfortableness .

Description

technical field [0001] The invention belongs to the technical field of rail vibration reduction and noise reduction, especially the design and structure of a self-locking rail bottom dynamic vibration absorber suitable for laying new lines or transforming old lines such as urban subways, light rails, intercity railways, and high-speed rail traffic. . Background technique [0002] During the operation of the rail transit system, the discontinuous contact between the wheel and the rail, as well as the impact and friction between the wheel and the rail, lead to unbalanced force on the rail, resulting in rail vibration and rail waviness. To solve this problem, the most direct method is to increase the support stiffness of the structure under the rail, but this method is extremely unfavorable for isolating wheel-rail vibration and is not feasible. [0003] In order to solve the rail vibration, the following methods are often used: [0004] 1. Perform free or constrained damping...

AI Technical Summary

Problems solved by technology

[0006] One is to use heavy rails or low rails, that is, to increase the strength of the rails and reduce the height of the rails, thereby improving the supporting capacity of the rails or increasing the vibration quality of the rails. This method will greatly increase the cost of rail construction;

[0007] The second is to use damping alloy steel rails, whose loss is much lower than that of viscoelastic damping treatment, the vibration damping effect is poor and the cost is high, and it is difficult to popularize and apply in actual engineering

[0008] In addition, the method of grinding the wheel-rail contact surface can also reduce the impact and friction of the wheel-rail, but this method is time-consuming and laborious, and will greatly increase the maintenance workload of the track

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