Loop sleeve type elastic metamaterial structure with low-and-medium-frequency vibration reduction characteristics

Abstract

The invention discloses a loop sleeve type elastic metamaterial structure with low-and-medium-frequency vibration reduction characteristics. According to the structure, a bottom surface is arranged on one side of a solid circular ring structure; a plurality of layers of circular rings are periodically arranged on the bottom surface along the radius direction of the solid circular ring structure from inside to outside; a trunk part is arranged in the innermost circular ring; four wedge-shaped blocks are arranged on the outer side of each layer of circular ring at intervals; the trunk part is connected with the wedge-shaped blocks on each layer of circular ring through four columnar structures to form a radial elastic structure; and the radial elastic structure extends outwards from the circular ring at the innermost layer and is connected with the side wall of the circular ring at the outermost layer to form the loop sleeve type elastic metamaterial structure with the low-and-medium-frequency vibration reduction characteristics. The radial elastic structure and the solid circular ring structure are connected to form a partially hollow structure, so excellent vibration reduction characteristics can be provided in low-and-medium-frequency environments.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a ring-type elastic metamaterial structure with medium and low frequency vibration damping characteristics. Background technique [0002] Elastic metamaterials are structures in which unit structures are arranged periodically. Because they can suppress the transmission of elastic waves in a certain frequency range, they have attracted great attention from researchers. In recent years, people have applied the concept and properties of elastic metamaterials to various fields. [0003] Various land transportation tracks such as buildings, bridges, and railways will vibrate due to various reasons, which will affect the strength of the structure, and the vibration generated by various precision instruments will also greatly affect the accuracy of the instrument. In view of the fact that the current vibration control of the construction industry and constructi...

AI Technical Summary

Problems solved by technology

In view of the fact that the current vibration control of the construction industry and construction machinery has not achieved ideal results, various construction and mechanical equipment will inevitably produce different degrees of vibration when they are applied, and elastic metamaterials are artificially designed periodic structures. It has a forbidden band characteristic, and it is a novel way to use its forbidden band characteristic to achieve vibration and noise reduction

[0004] Most of the current elastic metamaterials are based on the local resonance mechanism, which can achieve the effect of controlling large wavelengths in a small size, but the structure of the existing elastic metamaterials can provide a narrow bandgap range at low and medium frequencies, which is not effective for low-frequency shock absorption. Very limited, and the strength of the structure has not achieved the desired effect

Images