Built-in metal vibrator vibration and noise reduction dynamic vibration absorber structure of steel rail

Abstract

The invention provides a built-in metal vibrator vibration and noise reduction dynamic vibration absorber structure of a steel rail. The structure is arranged on the two sides of a steel rail web between two adjacent fasteners and comprises coating body protecting layers, elastic damping bodies and metal mass bodies. Each elastic damping body is tightly attached and fixed to the steel rail and comprises a first elastic damping body and a second elastic damping body which are stacked and fixed into a whole, wherein the hardness of each first elastic damping body is larger than that of each second elastic damping body. Each metal mass body is made of multiple wriggling wavy metal plates which are nested in the corresponding elastic damping body at intervals. Each coating body protecting layer covers the exposed face of the corresponding elastic damping body. By the adoption of the structure, on the premise that the requirement for the sufficient strength of a damping material is met, thedamping effective working area is increased in a wriggling mode, the vibration transmission attenuation rate is increased, the damping material has two different degrees of hardness so as to meet thevibration reduction requirements in different frequency ranges, rail traffic operation noise can be effectively reduced from the position of a noise source, and utilization of the structure does notaffect maintenance of rail traffic original infrastructures and rails.

Description

technical field [0001] The invention relates to the field of rail transit vibration reduction and noise reduction, in particular to a built-in metal vibrator vibration reduction and noise reduction device. Background technique [0002] Railways are considered an environmentally friendly means of transportation, providing a clean and efficient means of transportation. However, the noise caused by railway operation has become a source of sound pollution that cannot be ignored in the area along the track, causing considerable trouble to the work and life of residents along the line. At the same time, the noise problem is also one of the main factors limiting the speed and passenger capacity of rail vehicles. The main noise in rail traffic is caused by the wheel-rail rolling contact, the roughness on the wheel and the track forms an excitation and causes the wheel-rail to vibrate. The structure radiates noise as vibrations travel through the wheels and tracks. In order to red...

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Problems solved by technology

[0004] The rail shock absorber whose patent application number is 200480009892.6 has the following two disadvantages: one is that the resonant material only adopts one kind of elastic material, which can only suppress one or a small range of frequencies during use; The vibration damping device is only installed at the lower end of the rail, without considering the entire rail waist, and cannot achieve the best vibration damping effect

[0005] The constrained damping vibration and noise reduction plate with the patent application number 201621424869.X has the following two disadvantages: First, the part of the material where the vibration and noise reduction plate is bonded to the rail does not have damping characteristics, and it is easy to be damaged during the vibration reduction process. Cause secondary vibration; second, the counterweight is located on the outside of the vibration and noise reduction plate, and the center of gravity of the overall structure is shifted, and the device is prone to loose or even fall off during the vibration reduction process

In addition, the existing rail vibration damping device does not consider the different road conditions of the straight section and the curve section in the installation and use of the entire line, and a single vibration damping device design cannot achieve good vibration reduction on the entire line. noise effect

[0006] Rail dynamic vibration absorber is one of the effective methods to reduce vibration and noise from the source. At present, rail noise control measures are difficult to effectively reduce rail vibration and noise radiation

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