A lightweight combined panel structure for low-frequency sound insulation and its design method

Abstract

The invention discloses a lightweight combined-type plate structure used for low-frequency noise insulation. The lightweight combined-type plate structure is composed of a noise insulation substrate, beam piece units and supporting members. The beam piece units are fixedly connected on the noise insulation substrate through the supporting members, each beam piece unit comprises at least one cuboid-structured beam piece, and central points of the beam pieces are fixedly connected with the corresponding supporting members; the minimum order resonance frequency of one beam piece is identical with one target noise frequency. The design method includes the steps 1), respectively determining design parameters according to number of target noise bands; 2), determining a structural parameter of the noise insulation substrate; 3), when determining periodic spacing a, selecting the same within the range of 0<a<lambada; 4), determining structural parameters of the beam piece units, wherein the structural parameters include the number of the beam pieces and the thickness hr, the length lr and the width br of each beam piece; according to the number of the target noise frequencies, obtaining the number of the beam pieces in one-to-one correspondence to the number of the target noise frequency, and according to actual engineering requirements, respectively selecting the thickness hr of different beam pieces and calculating to determine the length lr and the width br of each beam piece.

Description

technical field [0001] The invention relates to sound insulation technology for low-frequency noise, in particular to a lightweight combined panel structure for low-frequency sound insulation and a design method thereof. Background technique [0002] In the field of engineering, in order to reduce or eliminate the adverse impact of noise sources on the surrounding environment, solid media such as plate structures or wall structures are usually used to isolate the noise source from the surrounding environment. This method is called sound insulation. However, the low frequency sound insulation performance of traditional sound insulation structures is governed by the law of sound insulation mass density—the greater the surface density, the greater the low frequency sound insulation. In other words, in order to achieve greater sound insulation in the low-frequency range, it is necessary to select sound insulation components with greater mass. However, actual engineering often h...

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Problems solved by technology

However, actual engineering often has great restrictions on the quality and cost of sound insulation components. Therefore, low-frequency and lightweight sound insulation components have become a major problem in the field of noise control.

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