一种优化激发电磁超声Lamb波的方法
An Optimal Excitation Mode of Electromagnetic Ultrasonic Lamb Wave
摘 要
超声Lamb波的频散特性和多模式特性导致回波信号复杂难于分辨。为了解决该问题, 结合电磁超声换能器 (EMAT) 的主要设计参数和Lamb波的特征方程, 推导电磁超声Lamb波的激发方程和激发曲线。通过选取电磁超声Lamb波在激发曲线上的工作点以削弱多模式和频散现象, 进而提出了一种优化激发电磁超声Lamb波的方法。采用该方法分析了零模式Lamb波在工程应用中的有效性, 并进行了试验验证。
电磁超声换能器
多模式和频散
激发方程
Lamb wave
EMAT
Multi-modes and dispersion
Exciting equation
Abstract
Ultrasonic Lamb waves characteristic of multi-modes and dispersion caused the signal to be too complex to identify. In order to solve the problem, combining with the main design parameters of electromagnetic acoustic transducer(EMAT) and the characteristic equation of Lamb wave, the exciting equation and curve were deduced. Through choosing the appropriate operating point on the curve to depress the influence of multi-modes and dispersion, an optimal excitation mode of electromagnetic ultrasonic lamb wave was proposed. Zero-mode Lamb waves validity in application was analyzed by this method, and verified by experiments.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 国防科技工业技术基础科研资助项目(B1220102302)
收稿日期 2009/12/8
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备注蒋 韬(1985-), 男, 博士研究生, 主要从事电磁超声导波检测技术的研究。
引用该论文: JIANG Tao,KANG Lei,ZHAI Guo-Fu,WANG Shu-Juan. An Optimal Excitation Mode of Electromagnetic Ultrasonic Lamb Wave[J]. Nondestructive Testing, 2010, 32(12): 914～917
蒋 韬,康 磊,翟国富,王淑娟. 一种优化激发电磁超声Lamb波的方法[J]. 无损检测, 2010, 32(12): 914～917
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参考文献
【1】MacLauchlan D, Clark S, Cox B. Recent advancements in the application of EMATs to NDE[C]. 16th World Conference on NDT, Montreal, 2004: 1154-1161.
【2】Wang S J, Kang L, Li Z C, et al. 3-D finite element analysis and optimum designe of electromagnetic acoustic trandsducers[J]. Proceesings of the CSEE, 2008, 29(30): 123-124.
【3】Wilcox P. A rapid signal processing technique to remove the effect of dispersion from guided wave signals[J]. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2003, 50(4): 419-427.
【4】倪园, 程建政, 张德俊, 等.利用频散补偿法消除兰姆波频散效应[J].无损检测, 2008, 30(7): 412-414.
【5】Alers G, Burns L. EMAT designs for special application[J]. Materials Evaluation, 1987, 45(10): 1184-1185.
【6】Alleyne D, Cawley P. Optimization of lamb wave inspection techniques[J]. NDT & E International, 1992(25): 11-22.
【7】黄瑞菊, 刘镇清.兰姆波无损检测有效性分析[C].中国声学学会1999年青年学术会议论文集, 武汉, 1999: 115-116.
【2】Wang S J, Kang L, Li Z C, et al. 3-D finite element analysis and optimum designe of electromagnetic acoustic trandsducers[J]. Proceesings of the CSEE, 2008, 29(30): 123-124.
【3】Wilcox P. A rapid signal processing technique to remove the effect of dispersion from guided wave signals[J]. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2003, 50(4): 419-427.
【4】倪园, 程建政, 张德俊, 等.利用频散补偿法消除兰姆波频散效应[J].无损检测, 2008, 30(7): 412-414.
【5】Alers G, Burns L. EMAT designs for special application[J]. Materials Evaluation, 1987, 45(10): 1184-1185.
【6】Alleyne D, Cawley P. Optimization of lamb wave inspection techniques[J]. NDT & E International, 1992(25): 11-22.
【7】黄瑞菊, 刘镇清.兰姆波无损检测有效性分析[C].中国声学学会1999年青年学术会议论文集, 武汉, 1999: 115-116.
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