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High-speed train wheel vibration absorbing device based on photonic crystals

A technology of phononic crystals and train wheels, which is applied to wheels, wheels, and vehicle parts characterized by rail running parts, can solve problems such as the influence of the band gap characteristics of phononic crystals, achieve simple structure, improve vibration absorption capacity, and facilitate The effect of installation

Active Publication Date: 2018-11-23
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of defect states will have an important impact on the bandgap properties of phononic crystals

Method used

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  • High-speed train wheel vibration absorbing device based on photonic crystals
  • High-speed train wheel vibration absorbing device based on photonic crystals

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Experimental program
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Effect test

specific Embodiment approach 1

[0031] Specific implementation mode one: combine Figure 1-Figure 2 Explain that a high-speed railway train wheel vibration absorber based on phononic crystals in this embodiment includes an upper cover plate 1, a lower cover plate 8, a vibration transmission rod 2, and “point defect” localized phononic crystal vibration absorbing components 6 and 7 , Bragger-type phononic crystal vibration-absorbing component 3 , vibration-isolation cushion layer 4 , buffer layer 5 .

[0032] Among them, the "point defect" localized phononic crystal vibration-absorbing component includes a square sleeve 6 and a plurality of scatterers 7, and the plurality of scatterers 4 are evenly distributed and fixed in circular holes on the square sleeve.

[0033] Among them, the Bragger-type phononic crystal vibration-absorbing component 3 includes a circular cylinder and a plurality of scatterers, and the plurality of scatterers are evenly distributed and fixed in the circular holes on the cylinder,

...

specific Embodiment approach 2

[0052] The assembly process of the high-speed train wheel vibration absorber based on phononic crystals is as follows:

[0053] (1) Hollow round holes are processed on the vibration isolation cushion, and they are connected in series by vibration transmission rods.

[0054] (2) The upper cover and the lower cover are respectively processed with threaded holes, the two ends of the vibration transmission rod are processed with threads matching the upper and lower cover, and the vibration transmission rod is fixed on the upper and lower cover.

[0055] (3) Grooves are processed on the buffer layer, and the vibration isolation pad is embedded in the grooves.

[0056] (4) Use triangular steel to fix the rubber buffer plate on the upper and lower cover plates.

[0057] (5) Use screws to respectively fix the upper cover and the lower cover on the square sleeve to complete the assembly.

[0058] The following factors should be considered in actual use:

[0059] 1. The period number...

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PUM

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Abstract

The invention provides a high-speed train wheel vibration absorbing device based on photonic crystals. The device comprises an upper cover plate, a lower cover plate, a 'dot defect' localized photoniccrystal vibration absorbing assembly, and a Bragger-type photonic crystal vibration absorbing assembly which is arranged in the space formed by the upper cover plate, the lower cover plate and the 'dot defect' localized photonic crystal vibration absorbing assembly. The device has the advantages of being simple in overall structure and convenient to produce, the device has better vibration absorbing and noise reduction effects on high-speed train wheels within medium high frequency domains, the requirements on working environments are lower, and the device can be used for reducing the noise of the high-speed train wheels, improving the noise and vibration characteristics of the high-speed train wheels, improving the working environment of workers and the like.

Description

technical field [0001] The invention relates to a vibration absorber, which belongs to the technical field of vibration noise reduction, in particular to a vibration absorber for high-speed railway train wheels based on phononic crystals. Background technique [0002] Among the existing vibration control measures, vibration isolation is the most widely used technology. At the same time, it must be pointed out that vibration cannot be completely eliminated. It can only be weakened by technologies such as vibration isolation until the effect of vibration is within our tolerance. In the range. [0003] Phononic crystals are composite materials composed of two or more elastic media in different lattice periods. In phononic crystals, materials with different densities and elastic constants are combined periodically according to the structure. Materials that are not connected to each other are called scatterers, and materials that are connected as a whole are called matrix. One ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60B17/00
CPCB60B17/0024
Inventor 冯青松杨舟辛伟
Owner EAST CHINA JIAOTONG UNIVERSITY
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