Composite damping plate made of low-frequency damping metamaterial

Abstract

The invention discloses a composite damping plate made of a low-frequency damping metamaterial. The composite damping plate comprises a plate body, wherein the plate body comprises a first upper composite layer, a middle layer and a first lower composite layer; both the first upper composite layer and the first lower composite layer are fibrous composite layers; the middle layer is a viscoelastic film damping layer and bonded with the first upper composite layer and the first lower composite layer through viscous-flow-state damping rubber; a hole array is arranged on the plate body, and a mass slice is mounted in each hole and embedded into the viscoelastic film damping layer. The composite damping plate integrates a multi-layer damping vibration attenuation function and a low-frequency vibration isolation function of an acoustic metamaterial, has the outstanding advantages that the low-frequency damping capacity is high, frequency-selecting damping is realized easily and the like, and has good environmental protection performance; the composite damping plate can be applied to control of vibration with the frequency within 1000 Hz, the vibration and noise reduction performance is improved greatly compared with a traditional material, and the composite damping plate can be applied to reduction, isolation and control of low-frequency vibration and noise in automobiles, ships and other equipment.

Description

technical field [0001] The invention belongs to the intersecting fields of vibration and noise control and functional composite materials, and in particular relates to a low-frequency vibration-reducing supermaterial composite damping plate structure. Background technique [0002] Low-frequency vibration and noise problems are ubiquitous in equipment such as automobiles, trains, aircraft, and ships. Due to the slow attenuation and strong penetration of low-frequency vibration and noise capabilities, it is difficult to obstruct and control them, which seriously restricts the performance of these equipment. The ride comfort even directly affects the equipment operation and the health and life safety of the passengers. [0003] In actual engineering, sound insulation materials and damping materials are often used to reduce low-frequency vibration and noise. However, when traditional sound insulation materials are used to isolate sound waves and vibrations, the thickness of t...

AI Technical Summary

Problems solved by technology

[0005] To sum up, for the problem of low-frequency vibration isolation below 1000 Hz, especially within 200 Hz, the existing damping plate either cannot meet the requirements of low-frequency reduction and vibration isolation; or the structure is too bulky, and the space conditions or costs do not allow it; It is effective for a single frequency or a narrow frequency band; therefore, a new type of damping plate with a wide frequency band and meeting the requirements of low frequency reduction and vibration isolation is urgently needed

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