Preparation method of lightweight composite photonic crystal sheet for noise reduction of transformer substation

Abstract

The invention discloses a preparation method of a lightweight composite photonic crystal sheet for noise reduction of a transformer substation, and designs the lightweight composite photonic crystal sheet according to the spectral characteristics of the noise of the transformer substation and based on a lightweight design method of the concept of local resonance performance release. The plate is matched with the noise spectrum characteristic of the transformer substation in band gap, and the weight and the size of the plate are greatly reduced compared with those of other local resonance typephononic crystals. A high-quality noise reduction metamaterial is provided for noise control of a transformer substation in the future, and compared with an existing noise reduction material, the thickness and the mass are obviously reduced, so that low-frequency noise of the transformer substation can be solved through a light-weight composite phononic crystal thin plate.

Description

technical field [0001] The invention relates to the field of phonon crystal design methods, in particular to a method for preparing a lightweight composite phonon crystal thin plate used for noise reduction in substations. Background technique [0002] With the development of society, the social electricity consumption increases year by year, and the construction of corresponding substations increases accordingly. The resulting noise pollution has had a great impact on the residents near the substation, and at the same time, it will also have a certain impact on the construction of the power grid. [0003] Due to the low-frequency and stable peak characteristics of the substation noise spectrum, conventional materials are either particularly bulky or unable to effectively reduce noise when controlling the noise. For example, the existing technical means for noise reduction in substations basically adopt the BOX-IN method, and its substrate is filled with very thick steel pl...

AI Technical Summary

Problems solved by technology

[0006] However, because the conventional local resonance phononic crystal is based on the energy band theory and the local resonance theory, the size of the scatterer increases accordingly when the band gap frequency decreases, so that the conventional phononic crystal sound insulation board is used in the control of substations, etc. Low-frequency noise does not reflect the advantages of lighter weight and higher sound insulation efficiency, which brings many restrictions and troubles to its engineering application and development

Images