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Double-layer pyramid type light vibration reduction metamaterial lattice structure

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

Active Publication Date: 2021-02-05
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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  • Double-layer pyramid type light vibration reduction metamaterial lattice structure
  • Double-layer pyramid type light vibration reduction metamaterial lattice structure
  • Double-layer pyramid type light vibration reduction metamaterial lattice structure

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[0022] The present invention will be further described below in conjunction with specific examples. 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 those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0023] The band gap range of elastic waves generated by the metamaterial lattice structure 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 calculations. For a lossless two-dimensional periodic arrangement structure, the propagation of elastic waves in the system satisfies the following relationship: ...

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Abstract

The invention relates to the technical field of engineering structure vibration reduction, in particular to a double-layer pyramid type light vibration reduction metamaterial lattice structure. The metamaterial lattice structure is composed of unit cells arranged in a two-dimensionally periodic manner, and the unit cells are generatively designed based on a double-layer pyramid type lattice structure. Each unit cell comprises an upper panel, a lower panel, eight double-layer pyramid type sandwich round bars arranged between upper panel and the lower panel, and a spherical resonance unit embedded in the intersection point of the eight double-layer pyramid type sandwich round bars, wherein the upper panel, the lower panel, the double-layer pyramid type sandwich round bars and the spherical resonance unit are all made of a glass fiber reinforced (GFR) nylon material. By embedding the periodically arranged round resonance units into the double-layer pyramid type light vibration reduction metamaterial lattice structure to generate a broadband gap, the purpose of vibration reduction is achieved; and the structure has the advantages of integrating light weight and vibration reduction functions, having a wide vibration reduction frequency range, being easy to manufacture, having good bearing capacity, avoiding changing of the external geometrical characteristics of the structure and the like.

Description

technical field [0001] The invention relates to the technical field of engineering structure vibration reduction, in particular to a double-layer pyramid light weight vibration reduction metamaterial lattice structure. Background technique [0002] Sandwich panels are mainly composed of upper and lower panels and an internal lightweight core, and have the characteristics of light weight, high specific strength and specific stiffness. As a kind of sandwich sandwich structure, a large amount of interconnected space inside the lightweight lattice structure makes it easy to design and multifunctional, and can realize functions such as heat insulation and energy absorption on the basis of ensuring the carrying capacity. fusion. At present, the research on lightweight lattice structures 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 bette...

Claims

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Application Information

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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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