publication . Article . 2019

characterizing excitability of lamb waves generated by electromagnetic acoustic transducers with coupled frequency domain models

Shen Wang; Songling Huang; Qing Wang; Zhe Wang; Wei Zhao;
Open Access
  • Published: 01 Mar 2019 Journal: Ultrasonics, volume 93, pages 71-80 (issn: 0041-624X, Copyright policy)
  • Publisher: Elsevier BV
  • Country: United Kingdom
Abstract
Abstract Electromagnetic acoustic transducers (EMATs) are versatile non-contact ultrasonic transducers with relatively low transduction efficiency. A fundamental problem not answered completely yet is how the structure of an EMAT influences the generation of various Lamb wave modes. We tackle this problem with fully coupled frequency domain EMAT models where the underlying integro-differential equations are solved directly and the magnitudes of the phasors of the displacement components at a point in the middle plane of a plate are used to represent the strength of the S0 and A0 mode waves. Idealized single-wire, two-wire and wire bundle EMATs with uniform bias ...
Subjects
free text keywords: Acoustics and Ultrasonics, Electromagnetic acoustic transducer, Ultrasonic sensor, Lamb waves, Magnet, Acoustics, Frequency domain, Physics, Magnetic field, Phasor, Transducer
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