Damping vibration-attenuation and noise-reduction method as well as pored damping sheet

A technology of vibration reduction, noise reduction, and damping sheet, which is applied in the direction of sound-emitting devices, instruments, pipes/pipe joints/fittings, etc., can solve the problems of unknown performance such as the frequency range of vibration reduction, durability, and adaptability, etc., to achieve Effects of simple structure, weight reduction, material and cost saving

Inactive Publication Date: 2012-07-04
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent has the same purpose as the present invention, but the patent does not give the frequency range of vibration reduction applicable to this achievement, and the durability, adaptability and other performances of this structure are unknown

Method used

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  • Damping vibration-attenuation and noise-reduction method as well as pored damping sheet
  • Damping vibration-attenuation and noise-reduction method as well as pored damping sheet
  • Damping vibration-attenuation and noise-reduction method as well as pored damping sheet

Examples

Experimental program
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Embodiment Construction

[0019] see figure 1 . In Example 1 of the present invention, a circular hole is opened on the sheet substrate, with a diameter of ф10 mm, a row spacing of 28 mm, and a column spacing of 6.67 mm. The damping sheet has four rows and nineteen columns of holes.

[0020] see figure 2 . In Example 2 of the present invention, a rectangular hole is opened on the sheet substrate, the hole size is 8×10, the row spacing is 28 mm, and the column spacing is 6.67 mm. The damping sheet has four rows and nineteen columns of holes.

[0021] For comparison between Embodiments 1 and 2 of the present invention and the working conditions without damping and the working conditions with damping and no openings, see image 3 .

[0022] Paste round holes and rectangular structures on the pipeline, and the implementation effect diagrams of the opening rate of 3% and 30% are respectively shown in Figure 4 with Figure 5 .

[0023] In the vibration and noise reduction method of the present inv...

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Abstract

The invention provides a damping vibration-attenuation and noise-reduction method as well as a pored damping sheet. The damping vibration-attenuation and noise-reduction method is characterized in that: the damping sheet which is periodically and uniformly pored is adhered to the outer side of a pipeline or a board, wherein the row distances and the column distances of holes which are opened on the damping sheet are the same. By structurally adhering the periodically pored damping sheet, the vibration and the radiation noise of a structure can be effectively reduced, particularly the vibration-attenuation effect below 800 Hz ranges from 8 to 10 dB. The pored damping sheet disclosed by the invention is simple in structure. Compared with the traditional damping layer, the material and the cost are saved and the structural weight is further lightened.

Description

technical field [0001] The invention relates to vibration and noise control technology, in particular to a method for damping vibration and noise reduction of tubular and plate structures and a damping structure. Background technique [0002] A damping structure refers to a structure that combines damping materials and components to dissipate vibration energy. Damping structures usually have four basic forms: free damping layer structure, spaced damping layer structure, constrained damping layer structure, and spaced constrained damping layer. Although their structures may be different, the basic mechanism is the same, and the common feature is to use the least damping material to exert the largest possible damping effect to achieve the purpose of vibration reduction. [0003] The damping sheet involved in this patent is a commonly used damping material. In the process of checking the existing patents, it was found that many damping sheets are used for vibration reduction, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/16F16L55/033
Inventor 陈源周明刚黄涛周敬东周小强张铮易军阮晓辉
Owner HUBEI UNIV OF TECH
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