瑞利波中升力对截止频率影响的数值研究

Proceedings of the 16th International Conference on Mechatronics - Mechatronika 2014 Pub Date : 2014-12-01 DOI:10.1109/MECHATRONIKA.2014.7018293

Kang Zhang, Pengxing Yi, Yahui Li, Xuming Zhang, Zailin Guan

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引用次数: 1

摘要

EMAT是一种非接触式传感器，但它对升力很敏感。为了研究瑞利波中升力对特征截止频率的影响，采用了有限元法。基于对源电流密度的不同假设，利用COMSOL仿真软件实现了三种计算公式。忽略蒙皮和接近效应将产生巨大的误差。用完整的配方得到的结果比较准确。在完整公式的基础上，建立了二维EMAT传输模型。在二维模型的基础上，详细研究了升力对特征截止频率的影响。

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Numerical investigation of the lift-off effect on the cut-off frequency in the Rayleigh wave

The EMAT is a non-contact transducer, but it is sensitive to the lift off. To study the lift off effect on the feature cut off frequency in the Rayleigh wave, a finite element method (FEM) is used. Based on different hypotheses of the source current density, three formulations are realized with the simulation software COMSOL. Ignoring the skin and proximity effects will yield enormous errors. The results obtained with the complete formulation are relatively accurate. A two dimensions (2D) EMAT transmitting model is built upon the complete formulation. On the basis of the 2D model, the lift off effect on the feature cut off frequency is investigated in detail.

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Proceedings of the 16th International Conference on Mechatronics - Mechatronika 2014

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