Steel rail vibration damping noise reduction method for self-absorption composite magnetic damping plate

Abstract

The invention discloses a method for vibration absorption and noise reduction of steel rails by self-attraction type combined magnetic damping sheets, which comprises the following steps: a rail web and a rail foot of a steel rail (1) are symmetrically provided with the combined magnetic damping sheets (2); the outer layers of the combined magnetic damping sheets are symmetrically provided with constraint metal plates (3) which are fixed at both sides of the steel rail by a U-shaped magazine clip (4); the combined magnetic damping sheets have the magnetism and are attracted on the side surfaces of the steel rail; related interfaces inside the combined magnetic damping sheets and between the combined magnetic damping sheets and the steel rail as well as between the combined magnetic damping sheets and the constraint metal plates can cause vibration friction and slide relatively during the vibration of the steel rail; the mechanical energy of the vibration is converted into thermal energy to be dissipated to eliminate the vibration energy or the vibration amplitude of the steel rail; and the combined magnetic damping sheets and the steel rail are not adhered, so the viscoelastic damping mechanism is lost, which ensures that the range of the vibration frequency is wider, the temperature change has smaller influence, and good vibration absorption and noise reduction effects exist in a wider range of frequency domain and temperature domain. The method has convenient installation and replacement, and obvious vibration absorption and noise reduction effects, and can be widely used for vibration absorption and noise reduction engineering of track traffic.

Description

technical field [0001] The invention belongs to the technical field of rail transit vibration reduction and noise reduction, and is especially a self-priming combined magnetic damping plate used for rail vibration reduction in the laying of new lines or the reconstruction of old lines such as urban subways, light rails, intercity railways, and high-speed rail traffic. method of noise reduction. Background technique [0002] In the field of rail transportation, free damping or constrained damping is used for rails, that is, damping plates are bonded to the surface of the rails, which is a method to deal with rail vibration and noise. [0003] At present, there are no examples of large-scale application of rail damping plates in domestic rail engineering, mainly because the current technology of rail damping plates has the following obvious deficiencies: [0004] Regardless of free-style damping or constrained damping, in order to achieve the effect of vibration and noise red...

AI Technical Summary

Problems solved by technology

[0003] At present, there are no examples of large-scale application of rail damping plates in domestic rail engineering, mainly because the current technology of rail damping plates has the following obvious deficiencies:

This makes the production process or installation process of the rail damping plate very complicated, and it is extremely inconvenient to replace and maintain, making it impossible to apply it on a large scale

Moreover, the adhesive strength is low, and the quality of the application is difficult to detect and control. Under the long-term dynamic load of the train, the damping plate is easy to partly or completely detach from the rail body, thus gradually losing the effect of vibration reduction and noise reduction.

[0005] In addition, the damping material is selective to the operating temperature and the vibration reduction frequency, and only has a good absorption effect on the vibration of a specific frequency range in a narrow temperature range, while the vibration frequency of the subway line is wide, and the temperature difference of some road sections, especially the ground line Large changes, it is not suitable for ordinary damping plate treatment

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