Numerical simulation of an electromagnetic acoustic transducer-receiver system for NDT applications

Journal Article · Sat May 01 00:00:00 EDT 1993 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/20.211323· OSTI ID:6483607

Ludwig, R; You, Z ^[1]; Palanisamy, R ^[2]

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1. Worcester Polytechnic Inst., MA (United States)
2. Timken Co., Canton, OH (United States)

Development of a novel multistage numerical model of an electromagnetic acoustic transducer (EMAT), with particular emphasis on an EMAT receiver is presented. This model includes five separate modeling states, i.e. (1) static magnetic field simulation of an electromagnet, (2) pulsed eddy current distribution of a generic meander-line coil suspended over a conducting specimen, (3) Lorentz force distribution due to the interaction of the static magnetic field with the eddy current distributions, (4) acoustic wave generation and propagation based on the dynamic Lorentz forces, and (5) acoustic wave detection by an EMAT receiver. In particular, this paper describes how the transient particle displacement fields are converted into an induced voltage response as part of the EMAT receiver system. Numerical simulations show that the voltage response is dependent on the wire spacing of the receiver coil.

• OSTI ID: 6483607
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 29:3; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
TRANSDUCERS
COMPUTERIZED SIMULATION
ULTRASONIC TESTING
ACOUSTICS
DETECTION
EDDY CURRENTS
ELECTROMAGNETS
LORENTZ FORCE
MAGNETIC FIELDS
MATHEMATICAL MODELS
NONDESTRUCTIVE TESTING
ACOUSTIC TESTING
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
EQUIPMENT
MAGNETS
MATERIALS TESTING
SIMULATION
TESTING
420500* - Engineering- Materials Testing