Title :
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
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;
Conference_Titel :
Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4799-4731-7
DOI :
10.1109/FENDT.2014.6928271
