| 非SIRT算法的工程地震波CT技术 |
| |
| 引用本文： | 潘纪顺,孙凯旋,张妞,李朋辉.非SIRT算法的工程地震波CT技术[J].CT理论与应用研究,2020,29(2):119-127. |
| |
| 作者姓名： | 潘纪顺 孙凯旋 张妞 李朋辉 |
| |
| 作者单位： | 华北水利水电大学地球科学与工程学院, 郑州 450045 |
| |
| 基金项目： | 河南省基础与前沿技术研究计划(112300410252)国家自然科学基金(41174052) |
| |
| 摘 要： | 地震波CT成果具有图像直观可靠、信息量丰富及适用性强等优点。实践成果表明,地震波CT技术在工程地质勘查、建筑物无损检测、大坝安全检测以及防渗墙质量检测等方面都有良好的探测效果。SIRT算法是地震波CT理论较为成熟的算法。本文提出一种基于Eikonal解的思想,费马原理,惠更斯原理及弯曲波前假设的有限元分析的FDM算法的Matlab计算机程序。该算法程序克服了SIRT算法的缺点,可以成功地处理任意变化的速度、高速对比、尖锐的边界和任意的测量布局。给出几个数值模拟实例进行实践,将两者结合在一起,前后对比,得出结论,并指导工程实践应用。
|
| 关 键 词： | Vidale方程 有限差分法 初至波 地震波CT 工程地球物理 |
| 收稿时间： | 2019-10-28 |
Non-SIRT Engineering Seismic Wave CT Technology |
| |
| Affiliation: | College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China |
| |
| Abstract: | The seismic wave CT results have the advantages of intuitive and reliable images, rich information and strong applicability. Practical results show that the seismic wave CT technology has a good detection effect in engineering geological survey, non-destructive testing of buildings, dam safety testing, and quality inspection of cutoff walls. The SIRT algorithm is a relatively mature algorithm of seismic wave CT theory. This paper presents a Matlab computer program for the FDM algorithm based on the idea of Vidale solution, Fermat's principle, Huygens' principle, and finite element analysis of the bending wave front hypothesis. This algorithm program overcomes the shortcomings of the SIRT algorithm and can be successfully processed Arbitrarily changing speeds, high-speed comparisons, sharp boundaries, and arbitrary measurement layouts are given to practice a few numerical simulation examples, combine the two together, compare before and after, draw conclusions, and guide engineering practice. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《CT理论与应用研究》浏览原始摘要信息 |
|
点击此处可从《CT理论与应用研究》下载全文 |
|
