Low-frequency vibration reduction light metamaterial lattice structure and manufacturing method thereof

Abstract

The invention relates to the technical field of engineering structure vibration reduction, in particular to a low-frequency vibration reduction light metamaterial lattice structure and a manufacturingmethod thereof. The metamaterial lattice structure is composed of two-dimensional periodically-arranged unit cells, and each unit cell comprises a base structure and a cuboid resonance unit embeddedinto the base structure, wherein the base body structure comprises an upper panel, a lower panel and an internal pyramid-shaped sandwich structure, the cuboid resonance units are located in the internal pyramid-shaped sandwich structure, each unit is composed of an upper part and a lower part, the upper part is made of a hard metal material, and the lower part is made of a glass fiber reinforced (GFR) nylon material. According to the invention, a broadband gap in a low-frequency range is generated by designing periodically arranged resonance unit structures, so that the purpose of efficient vibration reduction is achieved. The vibration damper has the characteristics that the bearing and vibration damping functions are integrated, the vibration damping frequency range is wide, the externalgeometrical characteristics of the structure are not changed, and the structure vibration can be effectively suppressed in a low-frequency range.

Description

technical field [0001] The invention relates to the technical field of engineering structure vibration reduction, in particular to a low-frequency vibration reduction lightweight metamaterial lattice structure and a manufacturing method thereof. Background technique [0002] As a new sandwich sandwich panel structure, the lightweight lattice structure consists of upper and lower panels and an inner lightweight truss core. Different from the traditional honeycomb sandwich structure and foam sandwich structure, the internal core of the lightweight lattice structure is composed of periodically arranged truss units. Typical lattice truss units include pyramidal, tetrahedral, 3 -D Kagome type etc. The unique open-hole truss structure of the lightweight lattice structure enables it to generate a larger interconnection space in addition to the traditional sandwich structure's light weight, high strength, impact resistance, energy absorption, and efficient heat dissipation. Theref...

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Problems solved by technology

[0005] At present, the technical research on thin-plate metamaterial structures is still mainly focused on homogeneous plates. Although thin-film or thin-plate metamaterial structures are expected to achieve good vibration damping effects, their load-bearing capacity is often poor.

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