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

Gradient film type periodic composite structure

A composite structure, film type technology, applied in the field of vibration reduction, can solve problems such as unsatisfactory effects, and achieve the effects of simple processing, strong use convenience, and widening the sound insulation frequency band.

Pending Publication Date: 2021-05-25
SOUTHEAST UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because sound insulation materials follow the law of mass action, the effect of traditional materials in the low frequency stage is not ideal

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
  • Gradient film type periodic composite structure
  • Gradient film type periodic composite structure
  • Gradient film type periodic composite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 Shown: This embodiment is a gradient film type periodic composite structure, which is composed of elastic film 1 , weight 2 , and support frame 3 . Wherein the material of the elastic film 1 is rubber, and the elastic film 1 is composed of upper and lower two films, and a weight 2 is placed in the middle of the two films. Then the air between the two films is evacuated, heated and pressed again, so that the weight 2 and the film 1 form a whole, and finally the whole is placed on the support frame 3 to be tightly fixed. The weight 2 is arranged periodically according to its center of mass, that is, the periodic structure can be divided into n square cells with a side length a, and the center of each square is the position of the center of mass of the weight 2. Each row, that is, the weight 2 of the cells in the x direction has the same mass, while the weight 2 of the cells in the y direction changes in a gradient.

[0029] Such as figure 2 As shown, ...

Embodiment 2

[0032] The main structure of this embodiment is the same as that of Embodiment 1, the difference is: as image 3 , 4 As shown, the weight 2 of this embodiment is a cylindrical metal sheet. Its radius decreases proportionally from bottom to top (that is, the y direction). According to whether the radius is consistent in the y direction, the weight 2 can be divided into three layers. The radii of the bottom three rows of weights 2 remain the same, and the middle four The radii of the rows of weights 2 remain the same, and the radii of the top four rows of weights 2 remain the same.

Embodiment 3

[0034] The main structure of this embodiment is the same as that of Embodiment 1, the difference is: as Figure 6 Shown: be the support frame 3 of adjustable film stress of the present invention, support frame 3 main body is by thickness The left frame made of the left aluminum alloy plate, the thickness is The right side frame that the aluminum alloy plate is made constitutes, and the left side frame and the right side frame have bolt holes 9 correspondingly, and are connected and fixed by bolts. Weld the pulley 5 on the frame on the left and right sides, install the elastic film 1 between the pulleys 5, the lower end of the elastic film 1 is fixed on the rubber gasket 4, and the upper end is fixed on the roller blind behind the left frame by the roller 6 on roller 7. By pulling the traction rope 8, the elastic film 1 can be pulled to move upwards, thereby adjusting the stress of the elastic film 1 . The frame on the right is designed in a 7-shape, the purpose is to faci...

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 gradient film type periodic composite structure which comprises an elastic film, heavy objects and a supporting frame, wherein the elastic film is composed of an upper film and a lower film, the heavy objects are placed between the two films, then air between the two films is evacuated, then heating and pressing are conducted so that the heavy objects and the films form a whole, and finally, the whole body is arranged on the supporting frame to be tightened and fixed, the heavy objects are arranged according to the center of mass of the heavy objects, that is, the periodic structure can be divided into n square cells with the side length of a, and the center of each square cell is the center of mass of each heavy object. The mass of the square cell additional weight changes in a gradient manner in proportion along one direction, so that sound insulation can be realized in a plurality of frequency bands, and a sound insulation frequency band is greatly widened.

Description

technical field [0001] The invention belongs to the field of vibration reduction, in particular to a gradient film type periodic composite structure. Background technique [0002] With the rapid development of science and technology, the quality of life has gradually improved. In military aviation, ships, vehicle engine manufacturing in life, and the requirements for sound insulation materials in buildings are increasing day by day. However, the sound insulation and sound insulation materials that we are familiar with, such as fibers, sound insulation panels, and sound insulation walls, are very effective in the higher frequency range. However, because sound insulation materials obey the law of mass action, the effect of traditional materials in the low frequency stage is not ideal. The thin-film acoustic metamaterial has the characteristics of light weight, low-frequency sound insulation, and strong design, and has become a new favorite in the field of vibration and noise...

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): G10K11/16G10K11/162
CPCG10K11/16G10K11/162
Inventor 万水王潇周鹏符俊冬申纪伟苏强年玉泽李夏元黄牧允
Owner SOUTHEAST UNIV