Transformer noise reduction method based on multilayer hexagond membrane-type acoustic metamaterial

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (2) : 201-207.

XIE Zelong1,YANG Tingfang1,LIU Hanyao2,ZHOU Huikang1,WANG Runpu1,SHAN Songyi1,ZHOU Qianghui1

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Abstract

Noise control of urban transformer is an urgent problem to be solved in power transmission and transformation projects. This paper analyzes the noise spectrum of a 110kV transformer, and obtains the distribution characteristics of the main frequency of transformer noise. A composite sound insulation structure based on multilayer hexagonal membrane-type acoustic metamaterial is designed by taking advantage of the complementarity of sound insulation ability of different types of membrane-type acoustic metamaterials. The sound insulation structure has the characteristics of small volume, strong sound insulation performance and good impact resistance. The finite element method is used to establish the simulation model of the hexagonal membrane-type acoustic metamaterial, and the influence of the thickness and prestress of the film on its sound insulation performance is studied and analyzed. The material is optimized based on the analysis results. On this basis, the finite element simulation model of composite sound insulation structure is established. The simulation results show that the composite sound insulation structure has high sound transmission loss at the main frequency of transformer noise, and the lowest is about 20.4dB, which can block the transmission of transformer noise.

Key words

transformers / membrane-type acoustic metamaterial / composite sound insulation material / noise

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XIE Zelong1,YANG Tingfang1,LIU Hanyao2,ZHOU Huikang1,WANG Runpu1,SHAN Songyi1,ZHOU Qianghui1. Transformer noise reduction method based on multilayer hexagond membrane-type acoustic metamaterial [J]. Journal of Vibration and Shock, 2024, 43(2): 201-207

References

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