A Modified LTI Ray Tracing Algorithm in Lamb Wave Tomography
Based on the analysis and comparison among existing ray tracing methods, a new modified linear traveltime interpolation (LTI) method is proposed in this paper. The developed method remains the virtue of LTI but is more precise than the original LTI. By analyzing the forward modeling and inversion process of the LTI algorithm, the backward ray tracing LTI algorithm is adopted. It can keep ray tracing from local minimum by computing the velocity of grid nodes in advance. Compared with original LTI, the new algorithm is able to compute the shortest ray path. Tomography based on the improved LTI traveltime data can reflect the size and property of the defect with high resolving power. The developed ray tracing technique for Lamb wave quantitative nondestructive evaluation is of great significance in both theory and practice.
Haiyan Zhang Xiuli Sun Xuerui Qi Qianwei Liu
School of Communication and Information Engineering, Shanghai University, Shanghai, China
国际会议
2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)
镇江
英文
1059-1062
2008-07-07（万方平台首次上网日期，不代表论文的发表时间）