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Supercell capable of forming composite structure with multiple band gap periods

A technology of composite structure and supercell, applied in the field of supercell

Pending Publication Date: 2020-10-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This characteristic of phononic crystal just makes up for the defects of traditional vibration suppression methods such as passive control and active control, and it is a good way and method to solve noise and vibration

Method used

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  • Supercell capable of forming composite structure with multiple band gap periods
  • Supercell capable of forming composite structure with multiple band gap periods
  • Supercell capable of forming composite structure with multiple band gap periods

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, this embodiment is a supercell structure diagram in which the embedded vibrator is cylindrical, and the protruding vibrator is cylindrical and cuboid respectively. The lattice constant of the matrix is ​​a, and the scatterer oscillators are arranged on one side of the matrix. The radius of the embedded oscillator is R, the radius of the two-component convex oscillator A is r, and the side length of the two-component convex oscillator B is d .

Embodiment 2

[0031] Such as figure 2 As shown, this embodiment is a supercell structure diagram in which the embedded vibrator is in the shape of a cube, and the protruding vibrator is in the shape of a cylinder and a cube respectively. The matrix lattice constant is a, and the scatterer oscillators are arranged on one side of the matrix. The side length of the embedded oscillator is D, the radius of the two-component convex oscillator A is r, and the side length of the two-component convex oscillator B is d.

Embodiment 3

[0033] Such as image 3 As shown, in this embodiment, the embedded vibrator is cylindrical, the protruding vibrator is cylindrical and cube-shaped respectively, and the supercell structure diagram is arranged on both sides of the substrate. The lattice constant of the matrix is ​​a, the radius of the embedded vibrator is R, the radius of the two-component convex vibrator A is r, and the side length of the two-component convex vibrator B is d.

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Abstract

The invention relates to a supercell capable of forming a composite structure with multiple band gap periods. The supercell comprises a substrate (1) and scatterer oscillators (2) periodically arranged on the substrate. The scatterer oscillators (2) are divided into embedded oscillators (2-1) and convex oscillators (2-2). And the convex vibrators (2-2) are divided into convex vibrators A (2-2-1) and convex vibrators B (2-2-2). The periodic composite structure formed by the supercell elements has multiple band gaps, and can play a role in inhibiting propagation of elastic waves or sound waves in multiple frequency ranges. Therefore, the integrated design of the structure and the vibration isolation system is achieved, and the supercell has the advantages of being light in weight, wide in vibration isolation frequency, high in reliability and the like and has wide application prospects in the engineering vibration isolation field.

Description

technical field [0001] The invention relates to a supercell, in particular to a supercell capable of forming a periodic composite structure with multiple band gaps. Background technique [0002] With the rapid development of economy and society, vibration and noise problems in transportation, machinery operation, human life and entertainment, construction and other aspects have attracted more and more attention. Classified according to whether energy needs to be used, traditional vibration suppression methods mainly include passive control and active control. [0003] In the 1990s, scientists discovered that the propagation of acoustic elastic waves on elastic materials with periodic structures would result in the inability of elastic waves to propagate within a certain frequency range, so the concept of phononic crystals (periodic composite structures) was proposed. Phononic crystals are structures in which unit cells are periodically arranged as the basic unit, that is, t...

Claims

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Application Information

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IPC IPC(8): G10K11/00G10K11/16
CPCG10K11/002G10K11/16
Inventor 万水周鹏王潇符俊冬年玉泽李夏元程红光
Owner SOUTHEAST UNIV
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