基于COMSOL的激光超声裂纹检测数值模拟研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

江苏出入境检验检疫局科技计划项目(No.2018KJ04)资助


Numerical simulation of crack position determined by laser ultrasound based on COMSOL
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为了利用激光超声技术检测裂纹信息,本文基于有限元分析软件(COMSOL)的热-固耦合物理场,建立激光超声无损检测模型,从激光的功率密度、空间分布、时间分布将激光等效成表面力源,采用完美匹配层、低反射边界、热绝缘边界消除边界回波。通过固定激励源与探针的距离,对探针信号的分析,进行了不同位置裂纹对脉冲回波峰值及到达时间影响规律的仿真,与实验相比较,此模型具有很高的正确性。结果表明:固定激励源与探针的距离,脉冲回波的峰值会随着裂纹与探针距离的减少而增大,脉冲回波的到达时间会逐渐提前;透射波的幅值会衰减,到达时间会稍有延迟。

    Abstract:

    In order to detect the crack information by laser ultrasonic technology,based on the thermo-solid coupling physics field of finite element analysis software (COMSOL),a laser ultrasonic non-destructive testing model is established.The laser is equivalent to the surface force source from the power density,spatial distribution and time distribution of the laser.Force source,the perfect matching layer,low reflection boundary,thermal insulation boundary are used to eliminate boundary echo.By fixing the distance between the excitation source and the probe and analyzing the probe signal,the simulation of the influence of cracks on the pulse echo peak and arrival time at different positions is carried out.Compared with the experiment,the model has high correctness.The results show that the distance between the fixed excitation source and the probe,the peak value of the pulse echo will increase as the distance between the crack and the probe decreases,and the arrival time of the pulse echo will gradually advance;the amplitude of the transmitted wave will attenuate and the arrival time will be slightly delayed.

    参考文献
    相似文献
    引证文献
引用本文

左欧阳,武美萍,唐又红.基于COMSOL的激光超声裂纹检测数值模拟研究[J].激光与红外,2020,50(10):1164~1171
ZUO Ou-yang,WU Mei-ping,TANG You-hong.Numerical simulation of crack position determined by laser ultrasound based on COMSOL[J].LASER & INFRARED,2020,50(10):1164~1171

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2020-10-28
  • 出版日期: