Steel rail using three-dimensional quasi photonic crystals to reduce vibration and noise

A phononic crystal, vibration reduction and noise reduction technology, applied in the field of steel rails using three-dimensional quasi-phononic crystals for vibration reduction and noise reduction, can solve the problems of complex manufacturing process, narrow application range, poor long-term service performance, etc., and achieve radiation noise reduction , the effect of suppressing vibration

Pending Publication Date: 2018-06-01
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the steel rail is one of the main sources of vibration and noise radiation. However, the existing damping steel rails and dynamic vibration-absorbing steel rails have complex manufacturing processes, poor vibration and noise reduction effects, narrow applicati

Method used

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  • Steel rail using three-dimensional quasi photonic crystals to reduce vibration and noise
  • Steel rail using three-dimensional quasi photonic crystals to reduce vibration and noise
  • Steel rail using three-dimensional quasi photonic crystals to reduce vibration and noise

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1: Such as figure 1 , 2 As shown, this embodiment specifically relates to a rail that uses three-dimensional quasiphononic crystals to reduce vibration and noise. The rail 1 includes a rail head 2, a rail waist 3, and a rail bottom 4; the rail waist 3 is connected to the rail head 2 and the rail bottom. 4; the rail bottom 4 of the rail 1 is fixedly connected with the sleeper through a fastener; a fastener pad 5 is arranged between the bottom of the rail bottom 4 and the sleeper; a plurality of three-dimensional quasi-phononic crystals are installed on the rail waist 3 6.

[0027] Such as figure 1 , 3 As shown, the three-dimensional quasi-phononic crystal 6 is in the shape of a quadrangular prism. A hole 7 is provided on one side of the rail waist 3 and a cover plate 8 is installed; the hole 7 does not penetrate the rail waist 3; each hole 7 is inserted inside There is a three-dimensional quasi-phononic crystal 6; one end of the three-dimensional quasi-phononic crys...

Example Embodiment

[0033] Example 2: Such as figure 1 , 3 As shown in 4, in this embodiment, the arrangement of the first phononic crystal unit 9a and the second phononic crystal unit 9b is the same as that of Embodiment 1. The difference between the two lies in the structure of the phononic crystal unit 9.

[0034] In this embodiment, the first phononic crystal unit 9a includes a piezoelectric ceramic core material and a metal film arranged on the surface of the piezoelectric ceramic core material; the metal film is a pure copper film, and the metal film is prepared by a pure copper process in the piezoelectric ceramic The surface of the core material; when the elastic wave propagates to the first phononic crystal unit 9a, the piezoelectric ceramic core material will vibrate under the action of the elastic wave and convert part of the vibration energy into electrical energy, which is set on the surface of the piezoelectric ceramic core material The metal film can immediately consume the charge on t...

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PUM

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Abstract

The invention discloses a steel rail using three-dimensional quasi photonic crystals to reduce vibration and noise. The steel rail comprises a rail head, a rail waist and a rail base, wherein the railwaist is connected between the rail head and the rail base; multiple three-dimensional quasi photonic crystals are mounted on the rail waist; the three-dimensional quasi photonic crystals are splicedby at least two photonic crystal units. The steel rail has the advantages that the three-dimensional quasi photonic crystals at the rail waist of the steel rail have the features of an elastic wave forbidding band and can effectively stop the propagation of elastic waves in the steel rail, and accordingly the vibration at the rail waist can be inhibited, and the radiation noise of the steel railcan be reduced.

Description

technical field [0001] The invention relates to a steel rail, in particular to a steel rail using a three-dimensional quasi-phonon crystal for vibration and noise reduction. Background technique [0002] my country is the country with the fastest development and largest scale of high-speed railway in the world. By the end of 2015, the operating mileage of high-speed rail reached 19,000 kilometers, ranking first in the world and accounting for more than 60% of the total mileage of high-speed rail in the world. Although my country has a vast territory and diverse geographical conditions, the high-speed railway has basically realized the efficient and comprehensive freight and passenger transportation functions nationwide. The weather impact is minimized, and the scheduling is more flexible. High-speed railway has many outstanding advantages such as large transportation capacity, fast driving speed, low energy consumption, small environmental pollution, small footprint, safe a...

Claims

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Application Information

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IPC IPC(8): E01B5/08E01B19/00
CPCE01B5/08E01B19/003
Inventor 冯青松孙魁黎子荣王威张思皓
Owner EAST CHINA JIAOTONG UNIVERSITY
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