A Double Pyramid Lightweight Vibration Damping Metamaterial Lattice Structure

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 ...

AI Technical Summary

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

Images