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所属单位：航空学院
发表刊物：Proc. Symp. Piezoelectricity, Acoust. Waves, Dev. Appl., SPAWDA
摘要：An FEM model is proposed for the generation of Lamb wave using meander-line-coil electromagnetic acoustic transducers (EMATs). We aim to investigate the contribution of dynamic electromagnetic field to generate Lamb wave in EMATs operating on the Lorenz principle. The EMAT model was described by static magnetic field, dynamic electromagnetic field, eddy current, Lorenz force, and displacement. First, the bias magnetic field by permanent magnet was simulated to generate Lamb wave. Secondly, the influence of dynamic electromagnetic field on the excitation process of Lamb wave was discussed in detail. Thirdly, a Lamb wave dispersion curve in frequency-wavenumber domain was plot by using 2D Fourier transform. The simulation and experiment results show that the dynamic magnetic field does not contribute to the excitation of the Lamb wave, and the influence of the dynamic magnetic field can be ignored in the modeling of the EMATs. © 2017 IEEE.
是否译文：否
发表时间：2018-04-17
合写作者：张应红,王厅,钱征华
通讯作者：王彬,钱征华