摘要
电磁超声换能器在工作中涉及到电场、磁场、力场和声场的相互耦合和转化,变量较多,尤其是在声场分析时更为复杂。本文采用ANSYS有限元仿真软件对电磁超声换能器进行仿真,得到了电磁超声换能器换能过程中其电场、磁场、力场的分布规律和主要特征;在电磁场模型的基础上,通过电磁结构耦合建立了声场模型,分析了表面波在被测试件中的辐射声场分布、指向性等规律,仿真结果和理论分析相吻合。
Analyzing the working process of the electromagnetic ultrasonic transducer （EMAT） which involves intercoupling and transforming between electrical field, magnetic field, force field and acoustic field, it contains many variables, especially in the acoustic field analysis. Through simulating the EMAT with the finite element method （FEM） of ANSYS, it obtains the main features and distribution regularities of the electrical field, magnetic field and force field in the transduction process of the EMAT. It builds the acoustic model by the coupling analysis between electromagnetic and structural model, and then it analyzes the acoustic field distribution and directionality rule of the surface wave （SW） in the＇test piece. The simulation results are consistent with the theory analysis.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第8期7-12,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51077036
51207105)
河北省自然科学基金(E2012202026
E2012202048)资助项目
关键词
电磁超声换能器
电磁场模型
洛伦兹力
声场模型
表面波
指向性
Electromagnetic ultrasonic transducer, electromagnetic model, lorentz force, acousticfield model, surface wave, directivity
