并行化交错网格法地震层析成像

Seismic tomography with parallel interlaced gridding

成都理工大学,四川成都610059

Chengdu University of Technology, Chengdu 610059, China

提出了一种新的地震波走时层析成像方法———交错网格法, 即利用高密度网格进行射线追踪, 以适应实测射线数的剖分网格进行成像计算, 并采用任务并行化逐炮点进行射线追踪。方法原理简单, 易于实现, 成像精度高, 运行效率高。

The interlaced gridding method, a new method for seismic wave traveltime tomography,was put forward in this paper. The method used dense grid to trace rays, sparse grid that fits actual rays to image and task parallelizing to reduce computation time. The interlaced gridding method is simple in principle, easy to realization, high in imaging precision and running efficiency. Numerical experiment and practice showed since the rays calculated were curved in imaging gridding unit,the interlaced gridding method was of high precision.