Multi-layer metal sponge structure high transmission loss vibration damping decking

Abstract

The invention discloses a vibration reduction paving plate with multilayer metal spongy structure and high transfer loss. The vibration reduction paving plate with multilayer metal spongy structure and high transfer loss consists of three parts: an upper faceplate, a lower faceplate and a middle interlayer, wherein a plurality of rows of criss-cross reinforcing ribs are arranged at the inner surface of each of the upper faceplate and the lower faceplate; the faceplates form separated interval units through the transverse reinforcing ribs and the longitudinal reinforcing ribs. The middle interlayer unit comprises a plurality of layers of separated distribution middle layer units formed by foam metal layers and rubber layers; the corresponding interval units, separated by the reinforcing ribs, between the upper and lower layers of faceplates are filled with the middle interlayer units. The upper faceplate is not directly connected with the lower faceplate; the upper faceplate and the lower faceplate form a paving plate whole through being bonded by the middle interlayer units. The middle interlayer is separated into a plurality of interlayer units; gaps are formed between the interlayer units; the interlayer units are not connected. The designed paving plate has the characteristic of high structure damping; the structure vibration of the paving plate can be effectively reduced; the structure vibration transfer loss is increased; meanwhile, the structure weight of the paving plate can be reduced.

Description

technical field [0001] The invention belongs to the field of vibration control, and in particular relates to a multi-layer metal sponge structure high transmission loss vibration damping plank. Background technique [0002] Usually, the power equipment inside the cabin is installed on the deck, which is in turn fixed to the cabin structure. When the power equipment is running, the load excitation caused by the instability of the power equipment will cause the vibration of the decking structure, and the vibration will be transmitted to the cabin shell through the decking, and the cabin shell will vibrate and drive the surrounding medium to generate sound radiation, which is the cabin. One of the important sources of structural vibration and its radiated noise. [0003] Most of the decking in engineering practice is a simple single-layer structure or a single-layer reinforced structure, and there are also patents involving the grid sandwich type decking structure. Traditiona...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of relatively large vibration transmission of the decking structure in the prior art, and propose a multi-layer metal sponge structure with high transmission loss vibration damping decking, so that the vibration transmission from the decking to the shell structure can be suppressed, and the reduction can be achieved. The purpose of planking and shell vibration and reducing shell sound radiation

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