Affiliations: [a] Research Centre for Inspection and Evaluation of
Nuclear Structural Integrity, State Key Laboratory for Strength and Vibration
of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University,
Xi'an, Shaanxi, China | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Yong Li, Research Centre for Inspection
and Evaluation of Nuclear Structural Integrity, State Key Laboratory for
Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an
Jiaotong University, Xi'an, Shaanxi, China. Tel.: +86 0 29 8266 5721; E-mail:
yong.li@mail.xjtu.edu.cn
Abstract: Multilayered Tubular Structures (MTS) such as pipeline are widely
employed in such industrial fields as nuclear energy, petroleum, etc. It is
vital to non-destructively evaluate MTS periodically before catastrophic
accidents take place. As one of the advanced Electromagnetic Nondestructive
Evaluation (ENDE) techniques, Pulsed Eddy Current Testing (PECT) has been found
advantageous over the other ENDE methods regarding evaluation of integrity of
MTS. In this paper, a fast forward model of PECT inspection of MTS is proposed
based on the analytical modeling, namely the Extended Truncated Region
Eigenfunction Expansion (ETREE). The closed-form expressions of PECT signals of
3D magnetic field and coil Electromotive Force (EMF) have been formulated. The
proposed model has been verified by Finite Element Modeling (FEM) and
experiments. The advantages of the model in terms of high computational speed
and accuracy have been identified.
Keywords: Electromagnetic nondestructive evaluation, pulsed eddy current testing, analytical modeling, multilayered tubular structures, finite element modeling
