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激光在铝板中激励Lamb波的多参量数值模拟

刘增华, 曹丽华, 冯雪健, 何存富, 吴斌

刘增华, 曹丽华, 冯雪健, 何存富, 吴斌. 激光在铝板中激励Lamb波的多参量数值模拟[J]. 无损检测, 2017, 39(7): 12-17. DOI: 10.11973/wsjc201707003
引用本文: 刘增华, 曹丽华, 冯雪健, 何存富, 吴斌. 激光在铝板中激励Lamb波的多参量数值模拟[J]. 无损检测, 2017, 39(7): 12-17. DOI: 10.11973/wsjc201707003
LIU Zenghua, CAO Lihua, FENG Xuejian, HE Cunfu, WU Bin. Multi-parameter Numerical Simulation of Lamb Waves Induced by Laser in Aluminium Plates[J]. Nondestructive Testing, 2017, 39(7): 12-17. DOI: 10.11973/wsjc201707003
Citation: LIU Zenghua, CAO Lihua, FENG Xuejian, HE Cunfu, WU Bin. Multi-parameter Numerical Simulation of Lamb Waves Induced by Laser in Aluminium Plates[J]. Nondestructive Testing, 2017, 39(7): 12-17. DOI: 10.11973/wsjc201707003

激光在铝板中激励Lamb波的多参量数值模拟

基金项目: 

国家自然科学基金资助项目(51475012,11272021);北京市属高等学校高层次人才引进与培养计划资助项目(CIT& TCD201304048)

详细信息
    作者简介:

    刘增华(1973-),男,教授,博士生导师,主要从事超声和电磁无损检测技术、结构健康监测及传感器测试技术方面的研究工作

    通讯作者:

    刘增华, E-mail:liuzenghua@bjut.edu.cn

  • 中图分类号: TB551;TG115.28

Multi-parameter Numerical Simulation of Lamb Waves Induced by Laser in Aluminium Plates

  • 摘要: 运用有限元方法,分析了激光参量和铝板参量对铝板中激光激励Lamb波的影响。通过建立轴对称的激光辐射模型,计算出不同激光能量下的瞬态温度场分布。研究结果表明,激光能量过高会使铝板表面损伤,应控制激光能量,使其低于材料损伤阈值。随后固定激光能量,改变铝板板厚和激光光斑半径的大小,发现光斑半径减小时,Lamb波激发率提高,频带变宽,所含的频谱成分更丰富。
    Abstract: The effects of the parameters of laser and aluminium plate on laser-induced Lamb waves in aluminium plates are analyzed by using finite element method. Through the establishment of axis-symmetry laser radiation model, transient temperature field distribution under different laser energy is calculated. Research results show that surface material will be damaged when the laser energy is too high. Therefore, laser energy should be controlled to be lower than material damage threshold value. While laser energy is fixed, plate thickness and laser beam radius are changed, it is found that excitation rate of Lamb waves increases and signal spectra band broadens and spectral component becomes richer when laser beam radius decreases.
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出版历程
  • 收稿日期:  2016-08-14
  • 刊出日期:  2017-07-09

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