摘要
通过分析某城市220 kV变压器的噪声频谱,得到变压器噪声主要频率的分布特性。将“双回”形腔和多孔吸声材料相互结合,提出一种“双回”形扩张式消声器,并根据变压器噪声主要频率的分布特性,对其结构进行改进并对改进后结构的穿孔率、穿孔孔径、穿孔板厚和穿孔间距等结构参数进行优化设计,得到优化后的串联式复合消声器。仿真结果表明,优化后的模型在低频段(200~600 Hz)吸声效果有较大改善,同时变压器主要频率段的降噪效果相较于改进后的复合消声器至少提升3 dB。研究结果可对改进串联式复合消声器提供一定参考。
The noise spectrum of a 220 kV transformer in a certain city was analyzed and the distribution characteristics of the main frequency of the transformer noise was obtained.Combining a double-loop shaped cavity with porous soundabsorbing materials,a double-loop shaped expansion muffler was proposed.According to the distribution characteristics of the main frequency of transformer noise,the structure of the muffler was improved,and the structural parameters such as perforation rate,perforation aperture,perforation plate thickness,and perforation spacing of the improved structure were optimized.And the optimized series composite muffler was obtained.The simulation results show that the sound absorption performance of the optimized model is significantly improved in the low frequency range of 200-600 Hz,and the noise reduction effect in the main frequency range of the transformer is improved by at least 3 dB compared to the improved composite muffler.The research results of this article provide a reference for improving the series composite mufflers.
作者
何斌
杨廷方
赵翔
谢泽龙
杨文超
李雄
HE Bin;YANG Tingfang;ZHAO Xiang;XIE Zelong;YANG Wenchao;LI Xiong(School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China;China Southern Power Grid Dongguan Chang′an Power Supply Company,Dongguan 523000,Guangdong,China)
出处
《噪声与振动控制》
北大核心
2025年第5期266-272,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(U1966207)。
关键词
声学
消声器
串联式
降噪
结构参数
变压器
acoustics
silencer
series connection
noise reduction
structural parameters
transformer
