Damping material filled foam metal embedded periodic cavity type underwater sound absorption structure

Abstract

The invention discloses a damping material filled foam metal embedded periodic cavity type underwater sound absorption structure comprising an open-cell foam metal framework, the open-cell foam metalframework is filled with a soft damping material, the upper surface and the lower surface of the open-cell foam metal framework are each provided with a hard damping material covering layer, the harddamping material covering layers and the open-cell foam metal framework form a sealing structure, and a plurality of holes are periodically formed in the sealing structure to form a cavity. The damping material filled foam metal embedded periodic cavity type underwater sound absorption structure has excellent mechanical properties and good underwater sound-absorbing performance, has more adjustable parameters including structural parameters and material parameters in the design aspect, can be correspondingly adjusted according to actual working condition requirements, and is simple in structure and easy to manufacture.

Description

technical field [0001] The invention belongs to the technical field of underwater sound-absorbing composite structures, and in particular relates to an underwater sound-absorbing structure filled with a damping material and embedded in foam metal with periodic cavities. Background technique [0002] With the continuous deepening of human exploration of the ocean, various underwater mechanical equipment continue to emerge. Vibration and noise will have a great impact on the life of the equipment and the accuracy of the instrument. The problem of underwater sound absorption and noise reduction has become increasingly complex and complex. problems that urgently need to be resolved. Most of the current underwater sound absorption and noise reduction technologies use polymer damping materials, such as rubber and polyurethane. These materials can play a certain role in sound absorption and noise reduction when used underwater, but at the same time there are some defects: as the w...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a periodic cavity-type underwater absorbent filled with damping material and foamed metal to address the above-mentioned deficiencies in the prior art. Acoustic structure, solving the problems of failure of traditional underwater sound-absorbing structures under deep water pressure and poor low-frequency sound-absorbing performance

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