面向城市变电站降噪的惯性放大声学超材料板应用  

Application of inertial amplified acoustic metamaterial plate for noise reduction from urban electric substations

作　　者：蒋科若 胡华杰 沈涛 岳龙 徐春土 JIANG Keruo;HU Huajie;SHEN Tao;YUE Long;XU Chuntu(State Grid Zhejiang Electric Power Corporation Ningbo Power Supply Company,Ningbo 315000,China;Ningbo Power Transmission and Transformation Construction Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]国网浙江省电力有限公司宁波供电公司,宁波315000 [2]宁波送变电建设有限公司,宁波315000

出　　处：《应用声学》2024年第5期964-970,共7页Journal of Applied Acoustics

基　　金：宁波永耀电力投资集团有限公司科技项目(KJXM2022004)。

摘　　要：城市变电站变压器、电抗器以及风机等设备产生的噪声对居民正常生活和工作产生不良影响。面向城市变电站设备低频噪声的控制需求,提出了采用惯性放大声学超材料板隔离变电站设备低频噪声向周边区域传递的防护方案,并为此首先建立了惯性放大声学超材料的能带及振-声学特性计算模型,在此基础上分析了带隙的结构参数调控规律,最后通过隔声实验对计算模型和参数调控规律进行了验证。结果表明:当在板上附加惯性放大机构后,结构在132~450 Hz及600~1409 Hz两个频段内出现了带隙,能够抑制弹性波的传播。跨距增大与惯性放大角增大都会带来隔声性能的提高。研究结果为惯性放大声学超材料板用于变电站低频噪声的隔离提供了设计依据。The noise generated by transformer,reactor and fan in urban electric substations has adverse effects on the routine life and work of surrounding residents.Aiming at the low-frequency noise reduction from urban electric substations,a plate adopting inertial amplification acoustic metamaterial(IAAMM)is proposed for being used to insulate the low-frequency noise from electric substations.To achieve the target,an analytical model is established for band-structure and vibro-acoustic characteristics of IAAMMs is established.On the basis of this model,parametric studies are performed to obtain the parameter regulation law(PRL)of the bandgaps of IAAMM plate.Finally experiments are conducted to verify the analytical model and also the obtained PRL.The results show that when the inertial amplification mechanism is added to the plate,the structure has a bandgap in the frequency bands of 132–450 Hz and 600–1409 Hz where the propagation of elastic wave can be significantly attenuated.Furthermore,the increase of span and inertia amplification angle of the IA mechanisms improve the sound insulation performance.These results are meaningful in providing the design guidance for IAAMM plates applied to low-frequency noise insulation from electric substations.

关 键 词：声学超材料 惯性放大 变电站 低频噪声 声透射损失 

分 类 号：TB535[理学—物理]