An improved analytical model of the magnetostriction-based EMAT of SH0 mode guided wave in a ferromagnetic plate - 文章详情页

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EI SCIE PubMed

摘要：

The　accuracy　of　electro-acoustic　energy　transfer　efficiency　(EAETE)　model　directly　determines　the　optimization　results　of　an　electromagnetic　acoustic　transducer　(EMAT).　In　this　study,　the　EMAT　model　of　SH0　mode　generation　based　on　magnetostriction　mechanism　is　re-examined.　In　the　existing　magnetostriction-based　EMAT　(MEMAT)　analytical　model,　an　approximate　method　of　dynamic　magnetic　field　was　employed.　Thus　the　effects　of　the　tested　ferromagnetic　materials　on　the　dynamic　magnetic　field　in　the　air　is　ignored　and　the　boundary　condition　between　air　and　material　is　not　exact.　As　a　result,　the　calculated　dynamic　magnetic　field　inside　the　tested　ferromagnetic　materials　is　incorrect,　thus　leading　to　the　calculation　errors　of　magnetostriction　body　force　and　the　final　EAETE　of　MEMAT.　The　rigorous　analytical　solutions　for　calculating　the　dynamic　magnetic　field　are　derived　based　on　Maxwell　equations　and　boundary　conditions　in　this　study.　The　prediction　results　of　improved　analytical　model　were　consistent　with　previously　reported　experimental　results.　Compared　with　existing　analytical　models,　the　improved　model　showed　the　higher　prediction　accuracy　of　several　parameters,　including　dynamic　magnetic　field,　magnetostriction　force　and　the　EAETE.　©　2020　Elsevier　B.V.

关键词：

Acoustic emission testing Analytical models Boundary conditions Electromagnetic field effects Energy transfer Ferromagnetic materials Ferromagnetism Guided electromagnetic wave propagation Magnetostriction Maxwell equations

作者机构：

[ 1 ] [Zhang, Xiaodong]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhang, Xiaodong]Institute of Fluid Science, Tohoku University, Sendai; 980-8577, Japan
[ 3 ] [Liu, Xiucheng]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Wu, Bin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [He, Cunfu]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing; 100124, China
[ 6 ] [Uchimoto, Tetsuya]Institute of Fluid Science, Tohoku University, Sendai; 980-8577, Japan
[ 7 ] [Takagi, Toshiyuki]Institute of Fluid Science, Tohoku University, Sendai; 980-8577, Japan

通讯作者信息：

刘秀成
[liu, xiucheng]college of mechanical engineering and applied electronics technology, beijing university of technology, beijing; 100124, china

电子邮件地址：

xiuchliu@bjut.edu.cn

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