Low-frequency vibration damping metamaterial

Abstract

The invention discloses a low-frequency vibration damping metamaterial which comprises a substrate plate. A hole array is formed in the substrate plate, an external ring-shaped permanent magnet is installed in each hole and fixedly connected with the substrate body, a metal ring is installed on the inner side of each external ring-shaped permanent magnet, and the metal ring is fixedly connected with each external ring-shaped permanent magnet. A cylindrical permanent magnet is further installed at the circle center position of each external ring-shaped permanent magnet and is connected with thecorresponding metal ring through a ring-shaped elastic membrane. The external ring-shaped permanent magnets, the metal rings, the ring-shaped elastic membranes, the cylindrical permanent magnets andthe like constitute a locally resonant cell of the vibration damping metamaterial. The low-frequency vibration damping metamaterial has ultra-low frequency band gaps and high damping low-frequency vibration absorption performance, and has the outstanding advantages of being low in band gap frequency, wide in vibration damping band gap, high in low frequency damping capacity, capable of realizing low-frequency vibration damping and the like. Compared with a traditional vibration damping metamaterial, the vibration damping and noise reduction performance is greatly improved, and the low-frequency vibration damping metamaterial can be used for lowering, isolating and eliminating low-frequency vibration and noise in equipment such as automobiles and ships.

Description

technical field [0001] The invention belongs to the field of vibration-damping metamaterials, in particular to a low-frequency vibration-damping metamaterial. The vibration-damping metamaterial involved in the invention can realize an ultra-low vibration-damping bandgap, and has excellent vibration-suppressing and vibration-damping properties within the bandgap range. Background technique [0002] Vibration and noise are ubiquitous. Nowadays, a large amount of noise and vibration generated by industrial production, transportation, and infrastructure construction have a huge impact on the normal work of equipment and people's lives, and even harm them. The suppression and elimination technology of vibration and noise is a common key basic technology to ensure the measurement accuracy of machining, maintain the normal function of weapons and equipment, and ensure the working performance and service life of equipment. [0003] The development of traditional vibration reduction...

AI Technical Summary

Problems solved by technology

However, limited by the rigidity of the middle layer, the natural frequency of the local resonance cell is difficult to achieve a low frequency, so it is still very difficult to attenuate low-frequency and ultra-low frequency vibrations

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