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Unit cell structure made of three-dimensional periodic composite material

A composite material and three-dimensional cycle technology, applied in the field of vibration reduction, can solve problems such as bearing micro-vibration, restricting the improvement of machining accuracy, and heating

Pending Publication Date: 2020-07-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Air bearings and macro-micro electromagnetic direct drives also have problems that cannot be ignored: the complex turbulent flow phenomenon in air bearings will cause micro-vibrations of the bearings, and the N-S equations involved have been a worldwide problem for decades; electromagnetic direct drives are inevitable. The ground will generate heat, causing structural deformation and errors, involving complex electric-magnetic-force-thermal coupling
Therefore, the motion stability of an ultra-precision motion platform with typical structural features of air bearing and electromagnetic drive is affected by micro-disturbances from multiple sources of electricity, magnetism, gas, solid, and heat, which has become a bottleneck restricting the improvement of machining accuracy.

Method used

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  • Unit cell structure made of three-dimensional periodic composite material
  • Unit cell structure made of three-dimensional periodic composite material
  • Unit cell structure made of three-dimensional periodic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, this embodiment is a unit cell structure of a three-dimensional periodic composite material, which includes a unit cell matrix 1 and a three-dimensional entity 3.

[0025] The unit cell matrix 1 is in the shape of a cube, and the body center is provided with a body center cavity 2; the body center cavity 2 is a spherical cavity.

[0026] The number of three-dimensional entities is 6, which are evenly distributed on the three lines of opposite face centers of the cube-shaped unit cell matrix 1, and are ellipsoid-shaped cavities. The distances between the six three-dimensional entities 3 and the body-centered cavity 2 are the same. , And the three-dimensional entity 3 is filled with a scatterer 4; the scatterer 4 is not filled or completely filled with the three-dimensional entity, and the scatterer 4 is filled from the side close to the body core cavity 2.

[0027] Such as image 3 As shown, the unit cell structure of the three-dimensional periodic co...

Embodiment 2

[0030] This embodiment 1 provides a unit cell structure of another three-dimensional periodic composite material, and its composition is similar to that in embodiment 1, except that: figure 2 As shown, the number of three-dimensional entities is 8, which are evenly distributed on the four diagonals of the cube-shaped unit cell matrix 1.

[0031] The scatterer 4 is also not filled with three-dimensional entities, but the scatterer 4 is filled from the side away from the body-centered cavity 2.

[0032] Such as Figure 5 As shown,

[0033] The scatterer 4 is a metal material scatterer; the unit cell matrix 1 is a foam, rubber, polyurethane or foamed aluminum matrix.

[0034] Example 2: Figure a =6mm, d =1mm, l 1 =1.6mm, l 2 =0.6mm, l 3 =0.8mm, l 4 =0.8mm, where l 1 Represents the major axis of the ellipsoid, l 2 Represents the minor axis of the ellipsoid, l 3 Indicates the distance from the vertex of the ellipsoid to the center of the cube, l 4 Represents the filling length of the scat...

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PUM

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Abstract

The invention provides a unit cell structure made of a three-dimensional periodic composite material. The unit cell structure is characterized by comprising a unit cell base body and a three-dimensional entities, the unit cell base body is cubic, and a body center cavity is formed in the body center of the unit cell base body; the three-dimensional entities are evenly distributed in the unit cellbase body with the body center cavity as the circle center and are cavities formed by rotating ellipsoids or any two-dimensional graph around any axis of the ellipsoids or any two-dimensional graph, and the three-dimensional entities are filled with scatterers. The invention provides a unit cell structure made of the three-dimensional periodic composite material, which can generate elastic wave forbidden bands in x, y and z directions of a Cartesian coordinate system, so that the unit cell structure can be used for manufacturing vibration and noise reduction artificial materials.

Description

Technical field [0001] The invention belongs to the field of vibration reduction, and particularly relates to a unit cell structure of a three-dimensional periodic composite material. Background technique [0002] At present, in the research fields of machinery, civil engineering and instruments, how to control vibration is a significant issue. For example, resonance will cause component failure. In addition, frequent vibration will accelerate the fatigue failure of metal components. Especially for precision instruments, it is necessary to ensure that they are not disturbed by vibration to ensure their accuracy. All vibrating objects are making sounds, and noise will affect people's quality of life and physical and mental health. Therefore, the research on vibration isolation and damping is of great significance. [0003] The three-dimensional periodic composite material involved in the present invention is also a three-dimensional phononic crystal. Phononic crystals are artific...

Claims

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Application Information

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IPC IPC(8): G10K11/162
CPCG10K11/162
Inventor 万水王潇符俊东周鹏申纪伟苏强年玉泽李夏元黄牧允
Owner SOUTHEAST UNIV
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