Shape Reconstruction of Flaws by Kirchhoff Approximation
In this article, three dimensional Kirchhoff inverse scattering method is modified to convenient form for two cylindrical specimens that include three dimensional defects. Two Aluminum cylinders with flaw models are prepared and ultrasonic measurements are carried out. The measurement area in the modified methods is restricted in the plane perpendicular to the axis of cylindrical specimen. Thats to say that the method is modified to convenient form to use measured waveforms in the x1-x2 plane. The measured wave data are fed into the inversion method and cross-sectional images are obtained. At the same time, we get the numerical results from all directions by finite element method. From the numerical analysis and experimental research for two kinds of defects, it is verified that the Kirchhoff inversion works well for both volumetric defects and surface defects.
Finite element Kirchhoff approximation Shape reconstruction Scattering
ZHENG Gangfeng WU Bin HE Cunfu
College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）