Parallel 3-D viscoelastic finite difference seismic modelling
Parallel 3-D viscoelastic finite difference seismic modelling
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DOI：
10.1016/s0098-3004(02)00006-7
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发表时间：
2002-10-01
影响因子：
4.4
通讯作者：
Bohlen, T
中科院分区：
文献类型：
--
作者：
Bohlen, T
计算能力已经发展到这样一种状态，我们可以开始在地震学家和工程师感兴趣的频率下对真实（复杂）的三维地球模型进行波场模拟。然而，在串联平台上，三维计算仍然限于小网格尺寸和短地震波走时。为了利用网络计算机的效率的并行3-D粘弹性有限差分（FD）代码的实现，它允许分布在几个PC或工作站上的工作，通过标准的以太网连接在一个内部网络。通过使用可移植的消息传递接口标准（MPI）的处理器之间的通信，运行时间可以减少，网格大小可以显着增加。此外，代码在大规模并行超级计算机上显示出良好的性能，这使得非常大的网格计算成为可能。这种实现大大扩展了3-D弹性/粘弹性有限差分建模技术的适用性，提供了一个有效的，便携式和实用的C程序。(C)2002爱思唯尔科技有限公司版权所有。
Computational power has advanced to a state where we can begin to perform wavefield simulations for realistic (complex) 3-D earth models at frequencies of interest to both seismologists and engineers. On serial platforms however, 3-D calculations are still limited to small grid sizes and short seismic wave traveltimes. To make use of the efficiency of network computers a parallel 3-D viscoelastic finite difference (FD) code is implemented which allows to distribute the work on several PCs or workstations connected via standard ethernet in an in-house network. By using the portable message passing interface standard (MPI) for the communication between processors, running times can be reduced and grid sizes can be increased significantly. Furthermore, the code shows good performance on massive parallel supercomputers which makes the computation of very large grids feasible. This implementation greatly expands the applicability of the 3-D elastic/viscoelastic finite-difference modelling technique by providing an efficient, portable and practical C-program. (C) 2002 Elsevier Science Ltd. All rights reserved.