跑道线圈换能器在铁路重载货车探伤中的应用  

Application of the racetrack coil electromagnetic transducer in online ultrasonic testing system for heavy haul freight train

作　　者：吴迪[1] 邵嘉麒 毕超 张博南 王亚平[1] 滕永平[1] WU Di;SHAO Jiaqi;BI Chao;ZHANG Bonan;WANG Yaping;TENG Yongping(School of Sciences,Beijing Jiaotong University,Beijing 100044,China;Metals&Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Beijing Xintai Zhihe Technology Development Co.,Ltd.,Beijing 100098,China)

机构地区：[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

出　　处：《应用声学》2022年第3期429-435,共7页Journal of Applied Acoustics

基　　金：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)。

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。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 diagram 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.

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 

分 类 号：TB552[理学—物理]