Sound absorbing and insulating screen structure

Abstract

The invention discloses a sound absorbing and insulating screen structure. The sound absorbing and insulating screen structure comprises a first panel, a first honeycomb core, a second panel, a second honeycomb core and a third panel which are adhered in sequence; small holes are formed in the first panel; grooves are formed in both the first honeycomb core and the second honeycomb core; the height of the first honeycomb core is not greater than that of the second honeycomb core; micro-pores are formed in the second panel; the third panel is a solid panel; the small holes, the micro-pores and honeycomb lattice cavities of the first honeycomb core and the second honeycomb core form a series-connected or parallel-connected Helmholtz resonant cavity structure, so that the frequency bandwidth of a sound absorbing structure is widened; the third panel and the Helmholtz resonant cavity structure form a composite Huygens Fresnel theory sound insulating structure. According to the sound absorbing and insulating screen structure, the problems that the conventional sound absorbing and insulating screen structure is low in rigidity, narrow in sound absorbing/insulating frequency band and difficult to clean and maintain are solved by adopting a composite material panel/honeycomb core sandwich structure, designing a multilayer series-connected/parallel-connected honeycomb sandwich structure and designing grooves in the side surfaces of the honeycomb cores.

Description

technical field [0001] The invention relates to a sound-absorbing and insulating screen structure, which can realize broadband noise reduction and belongs to the technical field of noise control. Background technique [0002] As people's pursuit of quality of life is getting higher and higher, many people hope to work and live in a relatively quiet environment without noise pollution. However, in public places, there are many noise sources, such as: factory equipment noise, airports, The noisy sound of the train station, the tire noise of various vehicles on the road, the noise of rail traffic, etc. These noises destroy the ideal acoustic environment and need to be controlled urgently. [0003] Sound absorption and insulation treatment of noise sources is a commonly used noise control method. Traditional sound absorption and insulation screens have a simple structure. For example, the sound barriers on both sides of the expressway usually use cement pouring or metal perforat...

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a sound-absorbing and insulating screen structure, by using composite materials to manufacture the first panel, the second panel and the third panel to cooperate with the first honeycomb core and the second panel Two honeycomb cores form a lightweight sandwich structure, which reduces the overall weight of the structure and overcomes the problem of heavy weight of traditional sound-absorbing and insulating screens; through the use of composite material panel / honeycomb core sandwich structure, the structural rigidity is improved, making up for the traditional sound-absorbing and insulating screen The defect of low screen rigidity; through the design of multi-layer series / parallel honeycomb sandwich structure, the problem of sound absorption and sound insulation frequency band of the traditional sound-absorbing screen is solved; groove, which solves the problem of difficult cleaning and maintenance of traditional sound-absorbing and insulating screens

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