基于波结构的Lamb波单一模态激励仿真
Excitation of Single Mode Lamb Wave Simulation Based on Wave Structure
摘 要
在中长距Lamb波检测中，研究单一模态与缺陷的作用极为重要。利用有限元分析软件ANSYS的APDL进行模块程序设计，按模态波结构的方式在有限元模型上进行位移加载，得到了单一的S0和A0模态，证明了这种加载方式的正确性和可靠性；对比分析了按激励信号带宽范围内复合频率合成波结构加载和按中心频率点波结构加载得到的波形。结果表明，在波结构变化不大的频段内，通常在频厚积＜2 MHz·mm范围内，可以用中心频率点的波结构来代替带宽范围内合成的波结构进行加载。
波结构
单模态
有限元法
Lamb waves testing
Wave structure
Single mode
FEM
Abstract
It is very important to study the interaction of fundamental single mode and defects in the area of middle-range and long-rang lamb waves inspection. Modularization programs were designed to load the displacement on the FEM modal in the way of mode wave structure using the ANSYS Parameter Design language, obtained the pure single S0 and A0 mode was obtained. It proved the correctness and reliability of this method. Comparing the obtained waveform of loading the wave structure in certain range frequencies of bandwidth and in the centre frequency of excitation signal respectively, it presents that when the wave structure variety is not obvious, usually less than 2 MHz·mm in the range of fd, the wave structure of centre frequency can replace the summing wave structure of a range of frequencies .
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 国家自然科学基金资助项目(10972014)
收稿日期 2010/11/2
修改稿日期
网络出版日期
作者单位点击查看
备注吴斌(1962-)，男，博士，教授，主要从事工程波动力学与现代测控技术研究.
引用该论文: WU Bin,ZHOU Wei,ZHENG Yang,HE Cun-Fu. Excitation of Single Mode Lamb Wave Simulation Based on Wave Structure[J]. Nondestructive Testing, 2011, 33(7): 1～4
吴斌,周伟,郑阳,何存富. 基于波结构的Lamb波单一模态激励仿真[J]. 无损检测, 2011, 33(7): 1～4
被引情况:
【1】刚铁,刘强, "薄板结构中Lamb波的检测与仿真",无损检测 35, 24-28(2013)
【2】禹化民,王维斌,吕小青,朱子东,刘清松,庞笑, "储罐底板缺陷兰姆波检测的影响因素",无损检测 37, 19-24(2015)
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参考文献
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【3】Benmeddour F, Grondel S, Assaad J. Study of the fundamental Lamb modes interaction with symmetrical notches［J］. NDT&E International,2008,41(1):1-9.
【4】Cawley P, Lowe M, Alleyne D. Practical long range guided wave testing: applications to pipes and rail［J］. Materials Evaluation,2003,61(1):66-74.
【5】Cawley P, Alleyne D. The use of Lamb waves for the long range inspection of large structures［J］. Ultrasonics,1996,34(2/5):287-290.
【6】El-Youbi F, Grondel S, Assaad J. Signal processing for damage detection using two different array transducers［J］. Ultrasonics,2004,42(1/9):803-806.
【7】周正干，冯海伟.超声导波检测技术的研究进展［J］.无损检测,2006,28(2):57-63.
【8】魏运飞，卢超，张在东.薄板声-超声检测时兰姆波传播模式的有限元模拟［J］.无损检测,2009,31(7):520-524.
【9】Lee B C, Staszewski W J. Lamb wave propagation modelling for damage detection: I. Two-dimensional analysis［J］. Smart Materials And Structures,2007,16(2):249-259.
【10】Lee B C, Staszewski W J. Lamb wave propagation modelling for damage detection: II. Damage monitoring strategy［J］. Smart Materials And Structures,2007,16(2): 260-274.
【11】王秀彦，孙雅欣，刘增华，等.ANSYS二次开发技术在弯管缺陷超声导波检测数值模拟中的应用[J].无损检测,2006,28(8):413-415.
【12】Rose J L.固体中的超声波［M］.北京：科学出版社,2004.
【13】Alleyne D, Cawley P. The interaction of lamb waves with defects［J］. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,1992,39(3):381-397.
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