摘要
为了探究电磁超声换能器激励、接收超声波过程以及超声波与缺陷的相互作用,分别对电磁超声横波换能器和导波换能器进行有限元仿真,同时对电磁超声换能器的关键几何参数进行优化,以提升换能效率。结果表明,电磁超声横波换能器换能效率与永磁体高度和提离距离密切相关;对于薄试件厚度测量,应根据检测精度和灵敏度选择激励频率;通过回折线圈间距设置获得所需导波模态。由仿真结果可知,缺陷深度与接收信号幅值存在线性关系。
In order to investigate the process of receiving ultrasonic waves excited by electromagnetic ultrasonic transducers and the interaction between ultrasonic waves and defects,finite element simulations were conducted on electromagnetic ultrasonic transverse wave transducers and guided wave transducers,and key geometric parameters of electromagnetic ultrasonic transducers were optimized to improve transduction efficiency.The research results indicate that the transduction efficiency of electromagnetic ultrasonic transverse wave transducers is closely related to the height and lifting distance of the permanent magnet.The thickness measurement of thin specimens requires comprehensive consideration of detection accuracy and sensitivity to select the excitation frequency.By setting the spacing between the folded coils,the desired guided wave mode can be excited and the signal-to-noise ratio can be improved.The guided wave detection results show a linear relationship between the defect depth and the received signal amplitude.
作者
汪棋
严濛
曾礼亮
周瑞琪
王海涛
李秋锋
WANG Qi;YAN Meng;ZENG Liliang;ZHOU Ruiqi;WANG Haitao;LI Qiufeng(Jiangxi Hengxi Engineering Quality Testing Co.,Ltd.,Nanchang 331717,China;Key Laboratory of Nondestructive Testing of the Ministry of Education,Nanchang Hangkong University,Nanchang 330063,China;AVIC Chengdu Aircraft Industry(Group)Co.,Ltd.,Chengdu 610073,China;The Second Construction Co.,Ltd.,of China Construction First Group,Beijing 100161,China)
出处
《实验室研究与探索》
北大核心
2025年第8期12-17,共6页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(12364056)
江西省科技厅科技专项(20232ABC03A31)
南昌航空大学研究生创新专项(YC2022-097)。
关键词
无损检测
电磁超声换能器
有限元仿真
参数优化
non-destructive testing
electromagnetic ultra sonic transducers
finite element simulation
parameter optimization
