This paper presents a wholly analytical method which combines electromagnetic and ultrasonic simulations for the study of an Electromagnetic Acoustic Transducer Array (EMAT). Analytical solutions to the eddy current problem for the meander coil used in an EMAT are adapted from the classic Deeds and Dodd solution, which was originally intended for circular coils. The analytical solution resulting from this novel adaptation exploits the large radius extrapolation and shows several advantages over the finite element method (FEM), especially in the higher frequency regime. The calculated Lorentz force density from the EM solver is then coupled to the ultrasonic simulations, which exploit an analytical solution for generating the distribution of surface waves. Beam features are studied, which can produce performance parameters for an EMAT array, facilitating the optimum design of such sensors. This total analytical approach to an EMAT simulation has not been reported previously to our knowledge.
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机译：本文提出了一种将电磁和超声模拟相结合的整体分析方法，用于电磁声换能器阵列（EMAT）的研究。 EMAT中使用的曲折线圈的涡流问题的解析解决方案改编自经典的Deeds and Dodd解决方案，该解决方案最初用于圆形线圈。这种新颖的适应方法所产生的解析解决方案利用了大半径外推法，并显示出优于有限元方法（FEM）的多个优点，尤其是在较高频率范围内。然后，将通过EM解算器计算出的洛伦兹力密度与超声模拟耦合，该超声模拟利用分析解决方案生成表面波的分布。对光束特征进行了研究，可以为EMAT阵列产生性能参数，从而促进此类传感器的优化设计。据我们所知，以前没有将这种用于EMAT模拟的整体分析方法进行报道。
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