High Resolution Simulation of Seismic Wave Propagation in Realistic Media with Complex Geometry

具有复杂几何形状的现实介质中地震波传播的高分辨率模拟

• 批准号: 28546759
• 负责人: Dr. Martin Käser
• 金额: --
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/28546759?language=en
• 关键词: Resolution; Simulation; Seismic; Wave; Propagation

Research on the interior structure of the earth and its geophysical properties are mainly based on results of seismology. Today, computer simulations of the propagation of seismic waves represent an invaluable tool for the understanding of the wave phenomena, their generation and their consequences. However, the simulation of a complete, highly accurate wave field in realistic media with complex geometry is still a great challenge. Therefore, the aim of the proposed research project is the study and development of a highly flexible and powerful simulation method able to incorporate different material properties of a medium, dynamic earthquake rupture processes, and difficult internal material boundaries as well as topography. The so-called ADER-Discontinuous Galerkin method has the unique property of a numerical scheme that achieves arbitrarily high approximation order for the solution of the governing partial differential equations. By the development of such highly accurate algorithms and their combination with latest high performance computer technology we aim for the solution of actual problems in numerical seismology in order to improve ground motion prediction after strong earthquake events, to estimate local seismic hazard and risk more precisely, and to advance reservoir monitoring and hydrocarbon exploitation in exploration seismology.

地震学成果是研究地球内部结构及其地球物理性质的主要依据。今天，地震波传播的计算机模拟是理解波动现象、其产生及其后果的宝贵工具。然而，在具有复杂几何形状的真实介质中模拟完整的、高精度的波场仍然是一个巨大的挑战。因此，拟议的研究项目的目的是研究和开发一种高度灵活和强大的模拟方法，能够将介质的不同材料特性，动态地震破裂过程，以及困难的内部材料边界和地形。所谓的ADER-间断伽辽金方法具有数值方案的独特性质，该数值方案可实现任意高的近似阶以解控制偏微分方程。通过发展这种高精度的算法并将其与最新的高性能计算机技术相结合，我们的目标是解决数值地震学中的实际问题，以改善强震事件后的地面运动预测，更精确地估计当地的地震危险性和风险，并推进勘探地震学中的储层监测和油气开发。