Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF0 Cites 8 Cited by
  • 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 application range, and poor long-term service performance. Therefore, it is urgent to propose a vibration and noise reduction rail that is simple to manufacture, has outstanding vibration and noise reduction effects, is widely applicable and has good long-term service performance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Embodiment 1

[0026] Embodiment 1: as figure 1 , 2 As shown, this embodiment specifically relates to a steel rail using a three-dimensional quasi-phonon crystal for vibration and noise reduction. The rail 1 includes a rail head 2, a rail waist 3 and a rail bottom 4; the rail waist 3 is connected between the rail head 2 and the rail bottom 4; the rail bottom 4 of the rail 1 is fixedly connected to the sleeper by fasteners; a fastener backing plate 5 is provided between the bottom of the rail bottom 4 and the sleeper; multiple 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, and 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 pass through 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 qu...

Embodiment 2

[0033] Embodiment 2: as figure 1 , 3 , 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 disposed on the surface of the piezoelectric ceramic core material; the metal film is a pure copper film, and the metal film is prepared on 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 arranged on the surface of the piezoelectric ceramic core material The metal film on the surface of the piezoelectric ceramic can immediately cons...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com