Unit structure for vibration suppression and noise reduction of rib plate

Abstract

The invention provides a unit structure for vibration suppression and noise reduction of a rib plate. The unit structure comprises a unit block, the unit block comprises a supporting device, an elastic part and a counterweight part, the supporting device comprises a supporting part, the elastic part is arranged on one side of the supporting part, and the counterweight part is arranged on one side, away from the supporting part, of the elastic part; the supporting part is used for supporting the elastic part and the counterweight part, and a structural channel and an air channel are formed between the supporting part and the elastic part; the structure further comprises a rib beam and a panel, the rib beam is fixedly connected with the panel, and the side, away from the elastic part, of the unit block is fixedly connected with the side, away from the panel, of the rib beam. Through a frequency-adjustable resonance system, the structure channel and the air channel which are formed by matching the elastic part and the counterweight part, the corresponding amplitude of vibration is suppressed by using the anti-phase inertia force caused by the resonance mode of the structure channel, and the sound wave radiation of a thin plate is hindered by using the high acoustic impedance caused by the anti-resonance mode of the air channel, so that the vibration suppression and noise reduction effects are improved, and the structure is simple and the installation is convenient.

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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