Page 107 - 《应用声学》2022年第3期

第 41 卷 第 3 期 Vol. 41, No. 3
2022 年 5 月 Journal of Applied Acoustics May, 2022

⋄ 研究报告 ⋄

跑道线圈换能器在铁路重载货车探伤中的应用 ∗

吴 迪 1† 邵嘉麒 1 毕 超 2 张博南 3 王亚平 1 滕永平 1

(1 北京交通大学理学院 北京 100044)
(2 中国铁道科学研究院集团有限公司金属及化学研究所 北京 100081)
(3 北京信泰智合科技发展公司 北京 100098)
摘要：针对在线车轮超声探伤系统的工程应用，研究了跑道线圈电磁超声换能器由洛伦兹力换能机制在钢中
产生的辐射声场。根据外磁场和线圈配置，将表面力源近似为非均匀的水平剪切力源，数值计算得到了此力源
的辐射声场指向性图，并与实验结果进行比对，结果表明辐射的水平偏振横波具有中间强两侧弱的指向性，对
理解跑道形电磁线圈超声换能器的辐射声场和在重载货车车轮辋裂缺陷探伤中的工程应用具有一定的指导
意义。
关键词：跑道形电磁线圈；重载货车车轮；辋裂缺陷；在线车轮超声检测；声场指向性
中图法分类号: TB552 文献标识码: A 文章编号: 1000-310X(2022)03-0429-07
DOI: 10.11684/j.issn.1000-310X.2022.03.013

Application of the racetrack coil electromagnetic transducer in online ultrasonic

testing system for heavy haul freight train

WU Di 1 SHAO Jiaqi 1 BI Chao 2 ZHANG Bonan 3 WANG Yaping 1 TENG Yongping 1

(1 School of Sciences, Beijing Jiaotong University, Beijing 100044, China)
(2 Metals & Chemistry Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China)
(3 Beijing Xintai Zhihe Technology Development Co., Ltd., Beijing 100098, China)

Abstract: The radiated sound field in steel produced by the Lorentz force transduction mechanism of the
racetrack coil electromagnetic ultrasonic transducer was studied for the engineering application of the on-line
ultrasonic flaw detection system for wheels. According to the external magnetic field and coil configuration,
the surface force source is approximated as a non-uniform horizontal shear force source. The directivity dia-
gram of the radiated sound field of this force source is obtained by numerical calculation and compared with
the experimental results. The result shows that the radiated horizontally polarized transverse wave has the
directivity characteristics of strong acoustic field in the central axis and weak one on both sides. The results
were guidance for understanding the radiated acoustic field of the racetrack coil electromagnetic ultrasonic
transducer and its engineering application of online wheel rim crack defect testing for heavy haul freight train.
Keywords: Racetrack electromagnetic coil; Heavy haul freight train wheel; Rim crack defect; Online train
wheel ultrasonic testing; Acoustic field directivity

2021-05-06 收稿; 2021-05-31 定稿
中央高校基本科研业务费专项 (2019JBM067), 国家重点研发计划项目 (2020YFF01015400ZL)
∗
作者简介: 吴迪 (1979– ), 男, 湖南江华人, 博士, 研究方向: 检测超声。
† 通信作者 E-mail: diwu@bjtu.edu.cn