Unlock instant, AI-driven research and patent intelligence for your innovation.

Multi-order shear type steel rail dynamic damping vibration absorber

A technology of dynamic damping and vibration absorber, applied in the field of rail, can solve the problems of reducing the running speed, affecting the living and working environment, and reducing the economic benefits of rail transportation, and achieves the effects of increasing consumption, reducing vibration and noise, and inhibiting transmission.

Active Publication Date: 2017-10-17
SHANGHAI UNIV OF ENG SCI
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vibration and noise problems in rail transit not only affect the surrounding living and working environment, but also affect the effective operation of the railway system
In order to meet the requirements of environmental standards, some trains can only reduce their running speed, and at the same time, some trains need to reduce or cancel some shifts in some areas. As a result, their design capabilities cannot be fully achieved, thereby reducing the economic benefits of rail transportation.

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
  • Multi-order shear type steel rail dynamic damping vibration absorber
  • Multi-order shear type steel rail dynamic damping vibration absorber
  • Multi-order shear type steel rail dynamic damping vibration absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1~3 What is shown is a schematic cross-sectional view of "a multi-stage shear rail dynamic damping vibration absorber" of the present invention. The main part of the damping absorber is a resonant combination 4 composed of multi-stage resonant mass blocks 2 and elastic damping layers 3; the resonant mass blocks 2 are arranged along the length direction of the rail 1 to form a wave dynamic damping absorber. The biggest advantage of this design is that a multi-degree-of-freedom spring-mass system is formed along the track system, and the frequency band formed is a wide frequency band or multiple segmental frequency bands with a certain bandwidth. While aiming at the lateral and vertical vibrations of the track, due to the relative shear vibration deformation between each mass block, the consumption of rail vibration energy is further improved, and the transmission of vibration energy along the direction of the track is suppressed at the same time.

[0037...

Embodiment 2

[0045] This application example is basically the same as the above-mentioned example 1, the difference lies in the manner in which the damper is fixed on the rail. Such as Figure 4 and Figure 5 As shown, the damping shock absorber is fixed on the rail 1 by elastic fasteners 7 .

[0046] The elastic fastener 7 is made of high elastic spring steel, and the damping vibration absorber is fixed on the non-working surface of the rail 1 by applying a pressing force on the outer surface of the damping vibration absorber.

[0047] Compared with the above-mentioned embodiment 1, the fixing method of the elastic fastener 7 has the advantage of being easy to disassemble, but requires sufficient space on the bottom surface of the rail. In addition, the pressure exerted by the elastic fastener 7 on the damping absorber must be large enough to ensure that the damping absorber will not fall off when vibrating, and it cannot be too large to limit the resonance effect of the damping absorbe...

Embodiment 3

[0050] Embodiment 3 is similar to Embodiment 1, except that the single mass body in the resonant mass 2 is not a whole block, but consists of multiple sub-mass bodies 20 placed in a medium with elastic damping properties. As shown in Figure 6, each of the sub-mass bodies 20 can also be composed of objects of different sizes and materials, such as cylinders, spheres or irregular bodies. Because the resonant frequency of each sub-mass body 20 is different, the effective application range of the damping vibration absorber is widened.

[0051] because of the frequency The use of a sub-mass body with a small mass means that the upper limit of the vibration isolation frequency of the damping vibration absorber is further improved.

[0052] The damper can be mounted on the rail with adhesive bonding or elastic fasteners.

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 belongs to the technical field of rails. A multi-order shear type steel rail dynamic damping vibration absorber comprises a multi-order resonance composite unit (4) formed by two or more resonant mass blocks (2) and an elastic damping layer (3), and the two or more resonant mass blocks (2) are parallelly arranged in the elastic damping layer (3); and the multi-order resonance composite unit (4) is arranged along a steel rail foot upper face (10) and a steel rail web face (11) of a steel rail (1), and closely connected with the steel rail foot upper face (10) and the steel rail web face (11). Compared with the prior art, when the multiple resonant mass blocks (2) vibrate, besides motion in the transverse direction and the vertical direction, shear deformation is formed between every two resonant mass blocks (2) at the same time; and the fluctuating phase difference formed by shear vibration deformation in the rail direction is opposite to fluctuating vibration formed by steel rail vibration in the rail direction in direction, and thus the fluctuating dynamic damping vibration absorber with different resonances is formed.

Description

technical field [0001] The invention belongs to the technical field of rails, and in particular relates to a multi-stage shear type rail dynamic damping vibration absorber. Background technique [0002] Due to the popularity of rail transit, the vibration and noise problems brought about by it have become increasingly prominent. In densely populated cities, the construction and operation of rail transit systems such as subways, light rails, intercity railways, and high-speed rails cannot avoid environmentally sensitive areas such as residences, businesses, offices, hospitals, and schools, and rail traffic is affected by environmental vibration and noise pollution. occupy a large share. The vibration and noise problems in rail transit not only affect the surrounding living and working environment, but also affect the effective operation of the railway system. In order to meet the requirements of environmental standards, some trains can only reduce their operating speed, and...

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
Patent Type & Authority Applications(China)
IPC IPC(8): E01B19/00
CPCE01B19/003Y02T90/00
Inventor 王安斌
Owner SHANGHAI UNIV OF ENG SCI