Sound insulation, vibration reduction and noise suppression multifunctional integrated metamaterial plate shell structure and preparation method thereof

Abstract

The invention provides a sound insulation, vibration reduction and noise suppression multifunctional integrated metamaterial plate shell structure and a preparation method thereof. The sound insulation, vibration reduction and noise suppression multifunctional integrated metamaterial plate shell structure comprises an integrated metamaterial plate shell module and a matrix stiffened plate shell, and the integrated metamaterial plate shell module comprises a first bending vibration part, a coupling part, a second bending vibration part and an acoustic decoupling part; the acoustic decoupling part is located between the first bending vibration part and the second bending vibration part, and the edge of the first bending vibration part and the edge of the second bending vibration part are connected to the coupling part; and the first bending vibration part comprises a first substrate plate shell and a plurality of first resonance units arranged on the first substrate plate shell, and the second bending vibration part comprises a second substrate plate shell and a plurality of second resonance units arranged on the second substrate plate shell. The structure achieves the integrated design of the low-frequency sound insulation function and the low-frequency vibration reduction function, meanwhile, the development time from design to application is shortened, and space is saved.

Description

technical field [0001] The invention belongs to the field of new materials and new structures for vibration and noise control, and in particular relates to a multifunctional integrated metamaterial plate shell structure and preparation method for sound insulation, vibration reduction and noise suppression. Background technique [0002] With the development of modern large-scale vehicles (such as spaceships, airplanes, rail trains, ships, automobiles, etc.) With the development of technology and intensified market competition, people are paying more and more attention to the low-noise cabin environment of vehicles, and are constantly pursuing a quiet cabin acoustic environment; the increasingly prominent vibration and noise problems of modern large-scale vehicles and people's demand for quiet cabin acoustics The requirements of the environment are in sharp contrast, and the problem of noise reduction in the cabin is imminent. However, due to the dual limitations of space and...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned background technology, and to provide a multi-functional integrated meta-material plate and shell structure for sound insulation, vibration and noise suppression. Under the condition of strength and performance, realize the multi-functional integrated design of low-frequency sound insulation and vibration reduction and noise suppression, which has excellent performance of low-frequency sound insulation and low-frequency vibration reduction, and at the same time reduces the development time from design to application and saves space; in addition, manufacturing and Easy installation, low cost, and high reliability, it overcomes the isolation and simplification of functions, long development time, extra space occupied, complex processing and installation, high cost, and poor reliability faced by traditional metamaterial structural design schemes for noise reduction in cabins and many other disadvantages

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