摘要
在论述钢管磁致伸缩导波检测原理的基础上,研制了相关实验装置。分析了轴对称布置的线圈和偏置磁场在低频激励时产生的波模式。使用L(0,2)模式对两种人工缺陷进行检测,得到直径＞3．5 mm的通孔和深度＞1．5 mm的横向刻槽的缺陷反射信号。结果表明磁致伸缩导波用于钢管无损检测是可行的。
The principles of testing steel tubes by guided waves based on magnetostrictive effect were introduced. An prototype of experimental system was developed. The modes resulted with stimulating in low frequency range and the axisyrmmetrical configuration of coils and bias magnetic fields were analyzed. Two types of defects of different sizes were tested using L（0,2） mode. The reflected signal from defects could be identified for through-wall holes of 3. 5mm in diameter and above, and notches of 1.5ram in depth and above. The experimental results showed the feasibility of magnetostrictive guided waves in steel tubes testing.
出处
《无损检测》
北大核心
2007年第3期113-116,共4页
Nondestructive Testing
基金
湖北省现代制造质量工程重点实验室开放基金(LMQ2005B08)
关键词
磁致伸缩效应
导波检测
钢管
通孔
横向刻槽
Magnetostrictive effect
Guided waves
Steel tubes
Through-wall hole
Transverse notch
