An elastic metamaterial wheel structure with medium and low frequency vibration damping properties

Abstract

An elastic metamaterial wheel structure with medium and low frequency vibration damping characteristics, including hollow ring structures periodically arranged in the radial direction, the ring structure includes a shell structure with an octagonal longitudinal section, and a middle ring structure is arranged in the shell structure Cylinder, annular connecting block 1 and annular connecting block 2, wherein the middle annular cylinder is located in the shell structure and is concentric with the shell structure, and annular connecting block 1 and annular connecting block 2 are used to connect the middle annular cylinder and the shell structure. The elastic metamaterial roulette structure of the present invention has a lower bandgap characteristic than the traditional phonon crystal structure, and it is convenient to process and manufacture it with a single material. And its bandgap can be adjusted by adjusting the radius of the circular cylinder, the wall thickness of the octagonal shell, and the position and thickness of the connecting block. The elastic metamaterial roulette structure of the present invention has potential applications in precision mechanical instruments, and can effectively control the middle and low frequency vibrations of the roulette structure.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to an elastic metamaterial wheel structure with medium and low frequency vibration damping properties. Background technique [0002] The wheel structure widely used in industrial machinery is usually the carrier or disseminator of vibration energy. Its structural form, dynamic characteristics and transmission mode of dynamic excitation force have an important impact on the vibration and noise of the entire system. Especially in precision instruments, the vibration of the wheel-type structure is a very typical problem, which will affect the accuracy and reliability of the mechanical system and reduce the service life of the structure. For now, the vibration and noise control of wheel-like structures usually adopts traditional methods, such as improving machining accuracy or adding damping devices to reduce vibration and noise. However, this will inevitably i...

AI Technical Summary

Problems solved by technology

The existing literature has achieved low-frequency bandgap characteristics through the cellular structure designed for two or more materials, but the structure designed for two or more materials cannot be fully realized in the current stage of processing and manufacturing, and the two Or it is difficult for a structure designed with multiple materials to meet industrial requirements in terms of strength and stiffness

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