Design method of full-frequency vibration reduction track structure

A design method and track technology, applied in the field of traffic engineering, can solve the problems of complex design, long design process, and numerous track parameters in the full frequency domain, and achieve the effect of rapid design, best full frequency performance, and solving environmental vibration.

Active Publication Date: 2021-06-22
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

This leads to severe vibration and noise in the car where the floating slab track is used
Low-stiffness damping fasteners are often accompanied by track corrugation, resulting in a sharp increase in wheel-rail high-frequency action and radiation noise
The effective damping frequency of the floating plate track of the vibration damping pad is above tens of Hz, and it is difficult to dampen the vibration of the medium and low frequency
This leads to the design of the rail vibration reduction level clearly meeting the requirements of the code, but in practice it is still an important reason for frequent complaints from passengers and surrounding residents
The full-frequency damping track can suppress vibration in the full-frequency domain, but the full-frequency track has many parameters and the design is complicated. It usually ne

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  • Design method of full-frequency vibration reduction track structure
  • Design method of full-frequency vibration reduction track structure
  • Design method of full-frequency vibration reduction track structure

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[0058] Example:

[0059] The design process of a full-frequency damping track structure is used to describe how the present invention realizes the rapid design of full-frequency damping track parameters.

[0060] (1) According to the limit and the space conditions of the track structure, the equivalent width of the track structure is determined to be 2900mm, the equivalent height of the track structure is 320mm, and the density of the reinforced concrete of the track slab is 2616kg / m 3 . Calculations can be obtained including rails (the rails are calculated according to the linear meter mass of 60kg) and the linear meter equivalent mass of the track is me=2548kg.

[0061] (2) According to the results of the environmental impact assessment, the intermediate frequency vibration isolation frequency f=12Hz is selected, and 6Hz≤f≤16Hz is satisfied, and the intermediate frequency equivalent benchmark stiffness of the full-frequency vibration-absorbing track is calculated:

[0062]...

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Abstract

The invention discloses a design method of a full-frequency vibration reduction track structure, and aims to realize rapid design of full-frequency vibration reduction track parameters. Comprising the following steps: determining an equivalent width and an equivalent height of a track structure according to a gauge and a track structure space condition, and calculating a track linear meter equivalent mass me according to a track size; according to the environmental assessment result, selecting the intermediate-frequency vibration isolation frequency f, f is larger than or equal to 6 Hz and smaller than or equal to 16 Hz, and calculating the intermediate-frequency equivalent reference stiffness k0 of the full-frequency vibration reduction track; (3) determining the axle load Wa of the vehicle, the distance xa1 from a first wheel to a coupler and the distance xa2 from a second wheel to the coupler according to the condition of a train running on the track, and checking the vertical displacement z of a track plate; determining a stiffness curve of the intermediate-frequency vibration isolator; selecting the mass mt of the low-frequency vibration isolator according to the track structure space, and calculating the rigidity kd and damping cd of the low-frequency vibration isolator; and determining the equivalent damping coefficient of the high-frequency damper.

Description

technical field [0001] The invention relates to the technical field of traffic engineering, in particular to a design method of a full-frequency damping track structure. Background technique [0002] Traditional rail vibration reduction measures include fasteners for vibration reduction, vibration-damping pads for vibration reduction, and point-supported floating slab rails for vibration reduction. They are respectively applied to low, medium, high and special level vibration damping sections. Traditional damping rails are only divided and used based on the maximum amount of vibration reduction. However, rail traffic induces a wide-band spectrum vibration, which includes low-frequency vibrations of a few hertz and intermediate frequency vibrations of tens of hertz. At the same time, it is accompanied by digital High-frequency vibration of hundreds of hertz. Traditional vibration-absorbing tracks can only reduce and isolate single-frequency vibrations. This leads to severe...

Claims

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Application Information

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IPC IPC(8): E01B19/00E01B9/68
CPCE01B19/003E01B9/68
Inventor 李忠继杨吉忠陈志贤林红松冯读贝王志强代丰杨文茂陈志辉肖飞知蒋尧陈以庭舒睿洪
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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