有限元声振耦合技术在变压器铁心噪声预估的应用  

Application of Finite Element Vibration and Acoustic Coupling Technique in Transformer Core Noise Prediction

作　　者：钱诗林 寇晓适 蔡永平 娄建勇[3] QIAN Shi-lin;KOU Xiao-shi;CAI Yong-ping;LOU Jian-yong(State Grid Henan Electric Power Research Institute,He’nan Zhengzhou 450052,China;China Electric Power Equipment and Technology Co.,Ltd.,Beijing 100052,China;School of Electrical Engineering Xi’an Jiaotong University,Shaanxi Xi’an 710049,China)

机构地区：[1]国网河南省电力公司电力科学研究院,河南郑州450052 [2]中国电力技术装备有限公司,北京100052 [3]西安交通大学电气工程学院,陕西西安710049

出　　处：《机械设计与制造》2018年第9期224-227,共4页Machinery Design & Manufacture

基　　金：国网河南省电力公司重点科技项目(5217A0170019);国家自然科学基金(50807042)

摘　　要：针对变压器铁心生产企业作业现场背景噪声高,传统测试方法无法满足在线评估产品性能要求的问题,利用结构振动-声耦合技术进行干式变压器铁心辐射噪声预估方法研究。采用商业有限元软件ANSYS建立了变压器铁心模型、划分了铁心结构网格以及确定了结构-流体耦合边界条件。仿真计算得到变压器主频100Hz条件下,铁心主级平面内中间下半部分位置声压较大的结果。经与实验测试值对比分析,验证了基于有限元技术的变压器铁心噪声预估方法的有效性和可靠性。Aiming at the problem that the background noise of the transformer core production enterprise is high,the traditional test method cannot meet the requirement of evaluating the performance of the product on-line.The structure vibration-acoustic coupling method was used to study the core radiation noise of dry-type transformers.The commercial finite element software ANSYS was adopted,the transformer model was established,the mesh was divided,and the structural-fluid coupling boundary condition was established.The simulation results show that the transformer has a large sound pressure at the lower half of the main stage in the main frequency of 100Hz.The validity and reliability of the core noise estimation method based on the finite element method are verified by comparing the simulation results with the experimental test.

关 键 词：变压器铁心 声振耦合 噪声预估 有限元 

分 类 号：TH16[机械工程—机械制造及自动化] TM41[电气工程—电器]