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A Double Pyramid Lightweight Vibration Damping Metamaterial Lattice Structure

A lattice structure, pyramid technology, applied in the direction of springs, etc., can solve the problems of complex manufacturing process, increase the quality of the structure, unfavorable metamaterial structure application, etc., and achieve the effect of simple manufacturing process, light weight, and low-frequency vibration suppression.

Active Publication Date: 2022-06-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] At present, the thin-plate metamaterial structure mainly obtains the elastic wave band gap by adding resonant units, but the resonant units with different materials make the manufacturing process of the lightweight lattice structure more complicated, which greatly increases the quality of the structure, and does not Conducive to the application of metamaterial structures in aerospace and other engineering fields

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  • A Double Pyramid Lightweight Vibration Damping Metamaterial Lattice Structure
  • A Double Pyramid Lightweight Vibration Damping Metamaterial Lattice Structure
  • A Double Pyramid Lightweight Vibration Damping Metamaterial Lattice Structure

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[0022] The present invention will be further described below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0023] The forbidden band range of elastic waves generated by the lattice structure of metamaterials can be obtained by calculating the dispersion curve. According to Bloch's theorem, the response of elastic waves in infinite periodic structures can be calculated using only one unit cell structure, which greatly reduces the time cost of finite element calculation. For a lossless two-dimensional periodic arrangement, the propagation of elastic waves in the system satisfies the following relati...

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Abstract

The present invention relates to the technical field of engineering structure vibration reduction, in particular to a double-layer pyramid light-weight vibration-damping metamaterial lattice structure, the metamaterial lattice structure is composed of two-dimensional periodically arranged unit cells, and the unit cells are based on double Derivative design of layered pyramid-shaped lattice structure, including upper and lower panels, 8 double-layer pyramid-shaped sandwich rods arranged between the upper and lower panels, and spherical resonance units embedded in the intersection of 8 double-layer pyramid-shaped sandwich rods , the upper and lower panels, the double-layer pyramid-shaped sandwich rod, and the spherical resonance unit are all made of glass fiber reinforced (GFR) nylon material. The present invention generates a broadband bandgap by embedding periodically arranged circular resonant units in a double-layer pyramid light-weight vibration-damping metamaterial lattice structure, thereby achieving the purpose of vibration reduction. The structure has light weight-vibration reduction functions integrated It has the characteristics of low vibration, wide frequency range of vibration reduction, easy manufacture, good bearing capacity, and does not change the external geometric characteristics of the structure.

Description

technical field [0001] The invention relates to the technical field of vibration reduction of engineering structures, in particular to a double-layer pyramid type light-weight vibration reduction metamaterial lattice structure. Background technique [0002] The sandwich panel is mainly composed of upper and lower panels and a lightweight core inside, and has the characteristics of light weight, high specific strength and specific stiffness. As a kind of sandwich structure, the large amount of interconnection space inside the lightweight lattice structure makes it easy to design and multi-functional, and can realize the functions of heat insulation and energy absorption on the basis of ensuring the bearing capacity fusion. At present, the research on lightweight lattice structure mainly focuses on the preparation method and mechanical properties of the structure. Compared with the single-layer sandwich lattice structure, the multi-layer sandwich lattice structure has better ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F1/366
CPCF16F1/366
Inventor 李冰李昊胡亚斌黄河源王文智侯赤赵美英万小朋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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