High-efficiency sound-absorbing unit panel and its design method for urban rail transit sound barrier

A technology for urban rail transit and sound barriers, applied in noise absorption devices, buildings, etc., can solve the problems of small low-frequency sound absorption coefficient, poor low-frequency noise absorption effect of urban rail transit, and low sound absorption efficiency of sound barrier unit panels. Achieve optimal noise reduction coefficient, improve low-frequency sound absorption coefficient, and achieve the effect of efficient solutions

Active Publication Date: 2018-12-11
CHINA RAILWAY DESIGN GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing metal sound barrier unit panels of urban rail transit are generally filled with porous sound-absorbing materials such as sound-absorbing rock wool and glass wool. , resulting in low overall sound absorption efficiency of the sound barrier unit panel
Therefore, the sound absorption capacity of the existing urban rail transit metal sound barrier unit plate does not fully meet the noise reduction needs of urban rail transit, and it is necessary to further optimize the design of its sound absorption performance

Method used

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  • High-efficiency sound-absorbing unit panel and its design method for urban rail transit sound barrier
  • High-efficiency sound-absorbing unit panel and its design method for urban rail transit sound barrier
  • High-efficiency sound-absorbing unit panel and its design method for urban rail transit sound barrier

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Embodiment Construction

[0030] The structure of the high-efficiency sound-absorbing unit panel of the urban rail transit sound barrier of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] see Figure 1-4 , The high-efficiency sound-absorbing unit board of the urban rail transit sound barrier of the present invention includes a first component, a second component, an FC board 6 and a sound-absorbing material 5 .

[0032] The first member includes a panel top surface 10 , a panel 1 and a panel bottom surface 11 connected in sequence, and a plurality of sound-through holes are formed on the panel 1 . The second member includes a backplane top surface 2, a backplane 3 and a backplane bottom surface 4 connected in sequence. The panel top surface 10 is connected to the backboard top surface 2, and the panel bottom surface 11 is connected to the backboard bottom surface 4, and together with the panel 1 and the backboard 3, the shell of the urban...

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Abstract

The invention discloses an urban rail transit sound barrier efficient sound-absorbing unit plate, comprising a first member, a second member, an FC (fiber cement) board and sound-absorbing material; the first member comprises a face plate top surface, a face plate and a face plate bottom surface that are connected in sequence, the face plate is provided with a plurality of sound holes, the second member comprises a back plate top surface, a back plate and a back plate bottom surface that are connected in sequence, the face plate top surface is connected ith the back plate top surface, the face plate bottom surface is connected with the back plate bottom surface, the connected surfaces, the face plate and the back plate jointly form a housing of the unit plate, the FC board is fitted in the housing and is provided with a plurality of through holes, and a cavity is formed between the FC board and the back plate; the invention also discloses a design method of the unit plate. The unit plate has greatly increased low-frequency absorption coefficient, better denoising coefficient and greatly reduced low-frequency noise for urban rail transit.

Description

technical field [0001] The invention relates to an urban rail transit sound barrier, in particular to an urban rail transit sound barrier high-efficiency sound-absorbing unit plate and a design method thereof. Background technique [0002] Noise barrier is one of the most widely used environmental noise control measures in urban rail transit. The metal plate-type sound barrier is a kind of sound barrier that is widely used in bridge sections in actual engineering, and is mainly used to control the noise transmission in the wheel-rail area of ​​urban rail transit. In order to enhance the noise reduction effect, the interior of the sound barrier unit board is filled with sound-absorbing materials. The noise emitted by the sound source is incident on the surface of the sound-absorbing material through the opening of the panel, and is transmitted into the material along the pores of the material fiber, and friction with the material converts the sound energy into heat energy, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01F8/00
CPCE01F8/0029
Inventor 胡文林刘冀钊
Owner CHINA RAILWAY DESIGN GRP CO LTD
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