基于多层六边形MAM的变压器降噪方法设计  

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

作　　者：谢泽龙 杨廷方[1] 刘寒遥 周慧康 王润璞 单淞译 周强辉 XIE Zelong;YANG Tingfang;LIU Hanyao;ZHOU Huikang;WANG Runpu;SHAN Songyi;ZHOU Qianghui(School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China;Hunan Institute of Metrology and Test,Changsha 410014,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114 [2]湖南省计量检测研究院,长沙410014

出　　处：《振动与冲击》2024年第2期201-207,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(51777015);长沙理工大学研究生科研创新项目(CXCLY2022083)。

摘　　要：城市变压器的噪声治理是输变电工程中亟需解决的问题。该研究对某110kV变压器的噪声频谱进行分析,得到变压器噪声主频的分布特性。利用不同类型薄膜声学超材料隔声能力的互补性,设计了一种基于多层六边形薄膜型声学超材料的复合隔声结构。该隔声结构具有体积小、隔声性能强的特点。采用有限元法对六边形薄膜声学超材料建立仿真模型,研究分析薄膜厚度与预应力对其隔声性能的影响,结合分析结果对该材料进行优化。在此基础上,建立复合隔声结构的有限元仿真模型。仿真结果表明,该种复合隔声结构在变压器噪声的主频点均具有较高的声传递损失,最低可达20.4 dB左右,能很好地阻断变压器噪声传播。The noise control of an urban transformer is an urgent problem to be solved in electric power transmission and transformation projects.The noise spectrum of a 110 kV transformer was analysed and the distribution characteristics of the main frequencice of the transformer noise were obtained.A composite sound insulation structure based on multilayer hexagonal membrane-type acoustic metamaterial was designed by taking advantage of the mutal 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 was used to establish the simulation model of the hexagonal membrane-type acoustic metamaterial,and the influences of the thickness and prestress of the film on its sound insulation performance is studied and analyzed.The material was optimized based on the analysis results.On this basis,the finite element simulation model of the composite sound insulation structure was established.The simulation results show that the composite sound insulation structure has high sound transmission loss at the main frequency of the transformer noise,and the lowest is about 20.4 dB,which can block the transmission of the transformer noise.

关 键 词：变压器 薄膜型声学超材料 复合隔声结构 噪声 

分 类 号：TB53[理学—物理]