Adaptive vibration-reducing and noise-reducing foam sandwich plate and preparation method thereof

Abstract

The invention discloses an adaptive vibration-reducing and noise-reducing foam sandwich plate and a preparation method thereof. The sandwich plate comprises an upper panel, a lower panel and a foam sandwich arranged in an intermediate layer, wherein the foam sandwich is a metamaterial isotropy ISOMAX foam structure, the structure consists of an anisotropic square wallboard structure and a triangular pyramid wallboard structure; the upper and lower panels are Qtech413 constrained damping panels, and are formed by bonding both upper and lower identical metal sheets through Qtech413 polymer damping glue and bonded. Compared with a traditional metal honeycomb and foam structure, the sandwich plate has strong rigidity and strength even under very light weight conditions, has strong anti-deformation and anti-destroying ability under strong acoustic excitation, and has ultra-light and super-strong performance; in addition, the upper and lower damping plates of the invention use the Qtech413 constrained damping plates, and can still adapt to reduction of vibration and noise in a wide frequency band without increasing structural quality and without affecting original mechanical properties of the structure.

Description

technical field [0001] The invention belongs to the technical fields of aerospace, ship and high-speed rail, and in particular relates to an adaptive vibration-reducing and noise-reducing foam interlayer board and a preparation method thereof. Background technique [0002] Metal honeycomb and foam sandwich panels are widely used in the wall panels of aerospace vehicles, rocket launchers, ships and high-speed rail due to their light weight, high strength, heat insulation, vibration reduction and noise reduction and other multi-functional structural integration features in structure. In the existing technology, the research on the strength and vibration and noise reduction performance of the lightweight porous material sandwich panel structure is mostly concentrated in the traditional four-deformation, hexagonal honeycomb sandwich panel and foam sandwich panel structure. With the rapid development of science, technology and economy and the needs of national defense and combat...

AI Technical Summary

Problems solved by technology

On the one hand, applying external structures or filling damping materials will increase the mass too much, thus affecting or changing the structure and mechanical properties of porous material sandwich panels too much

In addition, it is often only possible to reduce vibration and noise in certain low frequency bands, and it is difficult to adaptively reduce vibration and noise

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