相控阵超声检测的有限差分模拟及其在回波分析中的应用
Finite Difference Modeling of Phased Array Ultrasonic Testing and its Application to the Identification of Mode Conversion
摘 要
基于有限差分数值方法，建立相控阵超声检测数值模型。基于所建模型编程计算得到不同时刻相控阵探头发射声场分布图以及不同尺寸缺陷回波信号图。通过根部切槽相控阵检测试验验证了模型计算精度。利用斜切槽回波产生了山形波，并基于有限差分模型分析了各个波形产生的机理。结果表明，超声检测的数值模拟可以有效地用于变型波的识别。
有限差分
变形波
Phased array ultrasonic testing
Finite difference method
Mode conversion
Abstract
The phased array ultrasonic testing model is built based on finite difference method, and the acoustic field of PA probe and the echo of different defects are calculated, the model is validated by mean of the experiment results of notch, a three peaks echo is achieved on a slit notchblock and the model is used to analyze the reason of every echo and the result indicates that numerical modeling of ultrasonic testing is an efficient tool for identification of mode conversion.
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(Z052011T002)
收稿日期 2011/12/8
修改稿日期
网络出版日期
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备注张俊(1983-)，男，博士后，博士，主要从事超声声场计算与检测可靠性研究。
引用该论文: ZHANG Jun,DING Hui,ZHANG Yi-Cheng,SHI Yi-Fei. Finite Difference Modeling of Phased Array Ultrasonic Testing and its Application to the Identification of Mode Conversion[J]. Nondestructive Testing, 2012, 34(8): 1～4
张俊,丁辉,张益成,石一飞. 相控阵超声检测的有限差分模拟及其在回波分析中的应用[J]. 无损检测, 2012, 34(8): 1～4
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参考文献
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【2】Kazys R, Mazeika L. 3D Analysis of interaction of Lamb waves with defects in loaded steel plates［J］. Ultrasonics,2006,44(1):1127-1130.
【3】Satyanarayan L, Sridhar C. Simulation of ultrasonic phased array technique for imaging and sizing of defects using longitudinal waves［J］. Pressure Vessels and Piping,2007,84(12):716-729.
【4】Calmon P. Recent Development in NDT Simulation ［C］. Paris: WCU2003,2003:443-446.
【5】Wirdelius H. The Application of Mathematical Modelling of Ultrasonic NDT in the Qualification Process［C］. Brondby 7th ECNDT,1998,3(11):1-4.
【6】Bostrom A, Bovik P. Ultrasonic scattering by a side-drilled hole［J］. International Journal of Solids and Structures,2003,140(13):3493-3505.
【7】孙卫涛.弹性波动方程的有限差分数值方法［M］.北京：清华大学出版社,2009.
【8】Azar L, Shi Y, Wooh S C. Beam focusing behavior of linear phased arrays［J］. NDT & E International,2000,33(3):189-198.
【9】李太宝.计算声学［M］.北京：科学出版社,2003.
【10】吴有为.中厚板焊缝超声波探伤中的波型转换辨析［J］.无损检测,2009,31(8):622-624.
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