An Acoustic Black Hole Sandwich Plate Vibration Damping Structure

Abstract

An acoustic black hole sandwich plate vibration damping structure relates to a sandwich plate. The invention solves the problem of complex structure and high price when the existing active control method is used to solve the vibration and noise reduction problem of the aircraft structure. One side plane of the panel (1) and the backboard (3) of the present invention is provided with an orthogonal stiffened plate (4), and there are multiple cavities (7) in the orthogonal stiffened plate (4). A plurality of acoustic black holes (5) are embedded on the upper and lower sides of the acoustic black hole embedding plate (2), and a truncated hole (6) is opened at the thinnest position of the acoustic black hole (5), and the panel (1), both sides The acoustic black hole embedding plate (2) and the back plate (3) are fixedly connected in order from top to bottom, and each acoustic black hole (5) on the bilateral acoustic black hole embedding plate (2) is embedded in a cavity (7) Inside, the acoustic black hole (5) embedded in the cavity (7) is a unit cell structure. The invention is used for vibration reduction and noise reduction of aircraft.

Description

An acoustic black hole sandwich plate vibration-damping structure technical field The present invention relates to a kind of sandwich plate, be specifically related to a kind of acoustic black hole sandwich plate vibration damping structure, is a kind of multi- A layered composite sound insulation and vibration reduction structure belongs to the field of vibration reduction and noise reduction of aerospace and ship structures. Background technique In the field of power machinery such as aerospace and ships, vibration and noise problems are more common. The existence of the aircraft will not only affect the normal operation of various equipment of the aircraft, but also greatly affect the life of the staff. Therefore, the problems of vibration and noise in the field of aircraft engineering have always been paid attention to. for sailing Generally speaking, the method of active control and passive control can be used to solve the problem of vibration reduction and noi...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem of complex structure and high price when the existing active control method is used to solve the vibration and noise reduction problem of the aircraft structure

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