| 模拟退火方法在三维速度模型地震波走时反演中的应用 |
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| 引用本文： | 李飞,张雪梅,陈宏峰,何少林.模拟退火方法在三维速度模型地震波走时反演中的应用[J].中国地震,2017,33(3):355-364. |
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| 作者姓名： | 李飞 张雪梅 陈宏峰 何少林 |
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| 作者单位： | 中国地震台网中心, 北京市西城区三里河南横街5号 100045,中国地震台网中心, 北京市西城区三里河南横街5号 100045,中国地震台网中心, 北京市西城区三里河南横街5号 100045,中国地震台网中心, 北京市西城区三里河南横街5号 100045 |
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| 基金项目： | 国家自然科学基金（41604054、4274062）、中国地震台网中心青年科技基金课题（164040132051906）共同资助 |
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| 摘 要： | 采用块状建模以及三角形拼接的界面描述方式,并通过立方体速度网格线性插值获得块体内部的速度分布。正演过程中采用逐段迭代射线追踪方法计算三维复杂地质模型中的射线走时,并采用模拟退火方法进行了三维模型中的地震波走时反演研究。模型测试结果表明,使用的射线追踪和走时反演算法有效。
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| 关 键 词： | 模拟退火 三维 速度模型 走时反演 射线追踪 |
| 收稿时间： | 2017/3/23 0:00:00 |
| 修稿时间： | 2017/4/29 0:00:00 |
Simiulated annealing and its application in seismic traveltime inversion of 3D velocity model |
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| Li Fei,Zhang Xuemei,Chen Hongfeng and He Shaolin.Simiulated annealing and its application in seismic traveltime inversion of 3D velocity model[J].Earthquake Research in China,2017,33(3):355-364. |
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| Authors: | Li Fei Zhang Xuemei Chen Hongfeng and He Shaolin |
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| Institution: | China Earthquake Networks Center, Beijing 100045, China,China Earthquake Networks Center, Beijing 100045, China,China Earthquake Networks Center, Beijing 100045, China and China Earthquake Networks Center, Beijing 100045, China |
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| Abstract: | Seismic traveltime tomographic inversion has played an important role in detecting the internal structure of the solid earth. We use a set of blocks to approximate geologically complex media. The geological body is described as an aggregate of arbitrarily shaped blocks,which are separated by triangulated interfaces. We define the velocities at the given rectangle grid points for each block,and the heterogeneous velocities in each block can be calculated by a linear interpolation algorithm. We implement a segmentally iterative ray tracer(SIRT)to calculate traveltimes in the 3D heterogeneous block models. The simulated annealing method is employed in seismic traveltime inversion of 3D velocity model. Numerical tests indicate the effectiveness of our methods of ray tracing and traveltime inversion. |
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| Keywords: | Simulated Annealing 3D Velocity model Traveltime inversion Ray tracing |
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