Page 146 - 201903

第 38 卷 第 3 期 Vol. 38, No. 3
2019 年 5 月 Journal of Applied Acoustics May, 2019

⋄ 研究报告 ⋄

电磁超声横波换能器中线圈的优化设计

阳能军 封礼发 † 唐旭明 张宪宇 姚春江

(火箭军工程大学 304 教研室 西安 710025)

摘要 为改善电磁超声换能器在 1Cr18Ni9Ti 不锈钢材料中激发横波的特性，提出一种基于正交试验的优化
方法，并利用有限元仿真软件 COMSOL Multiphysics 建立了电磁超声横波换能器的有限元模型，应用正交试
验和极差分析法，分析了线圈各参数对电磁超声横波的近场长度和半扩散角的影响，比较了线圈各参数影响
程度的大小。结果表明，激励电流的频率和线圈的尺寸对横波的传播特性有着明显影响，提高频率会使得横波
的近场长度增大及半扩散角减小；其次，减小导线的宽度及间距，以缩小线圈尺寸能有效改善横波的传播特性。
关键词 电磁超声横波换能器，线圈，有限元模型
中图法分类号: TB552 文献标识码: A 文章编号: 1000-310X(2019)03-0428-06
DOI: 10.11684/j.issn.1000-310X.2019.03.020

Optimum design of coil in electromagnetic acoustic shear wave transducers

YANG Nengjun FENG Lifa TANG Xuming ZHANG Xianyu YAO Chunjiang

(Section 304 of Rocket Force University of Engineering, Xi’an 710025, China)

Abstract In order to improve the characteristics of transverse wave stimulated by electromagnetic acoustic
transducer in stainless steel made by 1Cr18Ni9Ti, an optimization method using orthogonal test was introduced.
Finite element mode of transverse wave electromagnetic acoustic transducer (EMAT) was established. The
orthogonal test and extreme difference analysis were applied to consider the parameters of the coil, which
impact on the near field length and half diffusion angle of electromagnetic acoustic transverse wave. The result
shows that the frequency of exciting current and the size of coil have obvious influence on the propagation
characteristics of the shear wave. Increasing the frequency will increase the near field length and decrease the
half diffusion angle of the shear wave. Reducing the width and spacing of the wire to reduce the size of the coil
can effectively improve the propagation characteristics of the shear wave.
Key words Electromagnetic acoustic shear wave transducer, Coil, Finite element mode

2018-09-18 收稿; 2018-12-28 定稿
作者简介: 封礼发 (1995- ), 男, 云南保山人, 硕士研究生, 研究方向: 兵器科学与技术。
† 通讯作者 E-mail: 834463289@qq.com