Steel rail shock absorber

Abstract

The invention provides a steel rail shock absorber which comprises a plate spring unit and a tuned mass unit, restrained points are arranged on the plate spring unit, at least one restrained point is restrained on a steel rail, the tuned mass unit is fixed to the plate spring unit, and the distance between the tuned mass unit and the restrained points forms a stress arm, and the tuned mass unit and the plate spring unit form a mass spring resonance subsystem. When the resonance frequency of a steel rail damper system is adjusted to be close to the resonance frequency of the steel rail, strong vibration of a subsystem is caused, counter-acting force with the reverse force phase is generated on a steel rail main system, and part of vibration energy transmitted by the steel rail main system is counteracted, or part of vibration energy is converted into other forms of energy such as heat energy and sound energy to be dissipated.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a rail shock absorber. Background technique [0002] With the continuous development of urban subways, light rails and other rail transportation tools, problems such as urban traffic congestion and environmental pollution have been greatly reduced; at the same time, during the operation of vehicles, the dynamic incentive force generated by the collision or friction between rail trains and rails It is inevitable that it will be transmitted to the surrounding area along the track subgrade path, causing environmental noise pollution problems. At the same time, the vibration energy will be transmitted to the train compartment to cause vibration and noise inside the compartment, resulting in a decrease in the comfort of the passenger environment. Because the wheel-rail excitation force has strong vibration energy in a wide frequency band, and the damping loss of the track system...

AI Technical Summary

Problems solved by technology

However, this kind of vibration absorber is designed with multiple rigid masses and elastic units as one. Due to the modal coupling between each degree of freedom, there is interference between each other. The change of any single degree of freedom parameter will inevitably cause the change of the resonance frequency of other degrees of freedom. , resulting in a very difficult design, and it is difficult to further increase the number of degrees of freedom of the damper

In addition, the rubber material is greatly affected by the bonding state, temperature and frequency. Any change in any parameter will lead to a significant change in the design stiffness value. Therefore, in actual use, the design frequency deviates greatly from the target frequency, making it difficult to be flexible. adjust

Furthermore, after the existing damper is designed and installed, once the parameters of the track system change or the aging and deformation of the product lead to a deviation between a certain design frequency and the target frequency, the entire damper must be replaced at the same time, so the maintenance cost is high

In addition, in order to obtain a better damping effect of the existing rail damper, additional mass must be added. For this reason, the existing rail damper has a large additional mass and poor low-frequency control effect

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