Finite Element Modeling of Acousto-Ultrasonic Lamb Wave Propagation Mode in Thin Plate
-
摘要: 在声-超声检测中, 正确认识超声波传播特性是其被有效应用的基础。通过有限元数值模拟的方法, 研究薄板中声-超声检测形式下超声波传播模式, 对模拟产生的波形信号用二维傅里叶变换法进行模式识别, 并与兰姆波的理论波数频散曲线进行对比, 证实产生了多模式兰姆波。使用波场快照图观测了声-超声检测方式下超声波的传播特性。研究表明, 将数值模拟方法和试验相结合是研究超声检测技术的有效途径。Abstract: In the acousto-ultrasonic technique, it is essential for successful application of the technique to understand the propagation characteristics of ultrasonic wave. An FEM method was used to investigate the acousto-ultrasonic wave propagation. The simulating signal was processed by 2-DFFT to recognize the modes and compare with the theoretical parameter curve of the frequency versus wave number spectrum. It had been found that the dominant acousto-ultrasonic wave produced were multimode lamb waves. In order to show the acousto-ultrasonic wave propagation, the results were presented in from of snapshots. It was approved that combine the numerical analysis with experiment was an efficiency way in the ultrasonic testing.
-
Keywords:
- Acousto-ultrasonic testing /
- Lamb waves /
- 2D-FFT /
- Finite element modeling
-
-
[1] 王勇.声—超声材料检测技术研究[D].北京: 清华大学, 2000: 6-19. [2] 李家伟, 陈积懋.无损检测手册[M].北京: 机械工业出版社, 2002, 1: 276-292. [3] 他得安, 黄瑞菊, 刘镇清.数值分析法在超声检测中的应用[J].无损检测, 2001, 23(11): 485-488. [4] 陈建忠, 史耀武.超声检测过程的数值模拟[J].无损检测, 2001, 23(5): 198-201. [5] 刘镇清, 黄瑞菊.薄板声-超声检测超声传播模式的实验研究[J].声学学报, 2000, 25(3): 268-273. [6] 张海燕, 他得安, 刘镇清.层状各向异性复合板中的兰姆波[M].北京: 科学出版社, 2008: 126-136. [7] Rose J L.固体中的超声波[M].何纯富, 吴斌, 王秀彦译.北京: 科学出版社, 2004: 91-95. [8] Alleyne D, Cawley P. A two-dimensional fourier transform method for the measurement of propagating multimode signals[J]. J Acoust Soc Am, 1991, 89(3): 1159-1168. [9] Heller K, Jacobs L J, Qu J. Characterization of adhesive bond properties using Lamb waves[J]. NDT&E International, 2000, 33(8): 555-563. [10] 张海燕, 吕东辉, 刘镇清.二维傅里叶变换在Lamb波模式识别研究中的应用[J].振动、测试与诊断, 2004, 24(1): 25-28. [11] 刘镇清, 他得安.用二维傅里叶变换识别Lamb波模式的研究[J].声学技术, 2000, 19(4): 212-214.
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 1