Unit structure for vibration suppression and noise reduction of stiffened plates

Abstract

The invention provides a unit structure for suppressing vibration and noise of ribs, including a unit block, the unit block includes a support device, an elastic part and a counterweight part, the support device includes a support part, and the elastic part is arranged on the support part On one side, the counterweight part is set on the side of the elastic part away from the support part; the support part is used to support the elastic part and the counterweight part, and a structural channel and an air channel are formed between the support part and the elastic part; rib beams and panels are also included , the rib beam is tightly connected with the panel, and the side of the unit block away from the elastic part is tightly connected with the side of the rib beam away from the panel. The adjustable frequency resonant system, structural channel and air channel are formed by the cooperation of the elastic part and the counterweight part. The anti-phase inertial force caused by the resonance mode of the structural channel is used to suppress the corresponding vibration amplitude, and the anti-resonance mode caused by the air channel is used. The high acoustic impedance hinders the sound wave radiation of the thin plate, improves the vibration suppression and noise reduction effect, and has a simple structure and is easy to install.

Description

technical field [0001] The invention relates to the technical field of vibration suppression and noise reduction applications, in particular to a unit structure for vibration suppression and noise reduction of a rib plate. Background technique [0002] Rib structure has high-strength support performance, and the shells of transportation vehicles, weaponry systems, and civil electrical facilities are mostly designed as rib structure. A typical ribbed structure is rigidly fixed to one or both sides of the thin plate structure by means of mechanical connection (such as riveting, welding, bolting, gluing, etc.) by criss-crossing rib beams. [0003] Due to the use of stiffened beams, on the one hand, the structural strength and bending stiffness of thin plates have been significantly improved; on the other hand, the structural vibration and sound radiation characteristics of ribbed plates are different from those of uniform plates. Specifically, in the low frequency band, the st...

AI Technical Summary

Problems solved by technology

[0006] The inventor believes that the existing vibration suppression and noise reduction measures for ribbed panels have not effectively combined the structural characteristics and vibration and sound characteristics of the ribbed panels, resulting in these vibration suppression and noise reduction measures being relatively cumbersome, and the vibration suppression and noise reduction effects are poor, and there is room for improvement. place

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