A fast analytical model of Electromagnetic Acoustic Transducers for evaluation of flat non-magnetic conductors

Author

Yong Li ; Yi-li Li ; Zhen-mao Chen

Author_Institution

State Key Lab. for Strength & Vibration of Mech. Struct., Xi´an Jiaotong Univ., Xi´an, China

fYear

2014

fDate

20-23 June 2014

Firstpage

237

Lastpage

241

Abstract

Simulations of electromagnetic field and the resulting Lorentz force of Electromagnetic Acoustic Transducers (EMAT) for evaluation of non-magnetic conductors are normally realized via Finite Element Modeling (FEM) which is subject to considerably high computation burden due to a large amount of meshes within the solution region. In light of this, this paper proposes an analytical model of EMAT for fast computation of electromagnetic field and Lorentz force of EMAT based on Extended Truncated Region Eigenfunction Expansion (ETREE), whilst the permanent magnet and spiral coil are taken into account. The established model is corroborated via FEM, and would benefit the design and optimization of EMAT for nondestructive evaluation of non-magnetic conductors.

Keywords

acoustic transducers; coils; conductors (electric); eigenvalues and eigenfunctions; finite element analysis; nondestructive testing; permanent magnets; EMAT; ETREE; FEM; Lorentz force; electromagnetic acoustic transducers; electromagnetic field; extended truncated region eigenfunction expansion; fast analytical model; finite element modeling; high computation burden; nondestructive evaluation; nonmagnetic conductors; permanent magnet; spiral coil; Analytical models; Coils; Conductors; Eddy currents; Finite element analysis; Lorentz covariance; Magnetic fields; analytical modelling; electromagnetic acoustic transducers; lorentz force; nondestructive evaluation;

fLanguage

English

Publisher

ieee

Conference_Titel

Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on

Conference_Location

Chengdu

Print_ISBN

978-1-4799-4731-7

Type

conf

DOI

10.1109/FENDT.2014.6928271

Filename

6928271