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A Novel Method for Modeling and Analysis of Meander- Line-Coil Surface Wave EMATs

机译:曲折线圈表面波EMAT建模与分析的新方法

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摘要

A novel 3-D model for meander-line-coil surface wave electromagnetic acoustic transducers (EMATs) operating on the Lorentz principle is established by combining numerical calculations and analytical solutions. Simulation and analysis find that surface waves generated by the Lorentz force due to dynamic magnetic field is more sensitive to flaws, and the force due to the dynamic magnetic field generates surface waves more efficiently than that due to the static one when the excitation current exceeds 528.9 A. The accuracy of the established model is verified by experiment.
机译:通过将数值计算和解析解相结合,建立了一种基于洛伦兹原理的曲折线圈表面波电磁声换能器(EMAT)的新型3-D模型。仿真分析发现,当励磁电流超过528.9时,由动态磁场产生的洛伦兹力产生的表面波对裂纹更敏感,与由静态磁场产生的力相比,由动态磁场产生的力更有效地产生表面波。答:建立的模型的准确性已通过实验验证。

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