Simulation of seismic wave fields by non-conventional BIEM

非传统 BIEM 地震波场模拟

• 批准号: 218412963
• 负责人: Professor Dr.-Ing. Frank Wuttke
• 金额: --
• 依托单位: Institute of Mechanics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/218412963?language=en
• 关键词: Simulation; seismic; wave; fields; non

The aim of the project is to develop an efficient numerical tool in computational geomechanics for seismic simulations in regions with natural or induced (due to the geothermal engineering) seismicity. The proposed method can take into consideration the following key factors: (a) the lateral inhomoge-neity in a local geological soil stratum due to non-parallel layers and relief peculiarities; (b) the stepwise or continuously inhomogeneous half-space, where the local geological region and the seismic source are situated. The novelty of the proposed work concerns: (a) a new non-conventional BIEM based on Green’s func-tions for a continuously inhomogeneous half-plane is developed, validated, inserted in software and involved in intensive simulations for different seismic scenarios; (b) due to the usage of Green’s function the solution accuracy increases and the CPU time and memory is reduced in comparison with the conventional BIEM; (c) the capability to account for the three main components - seismic source, inhomogeneous wave path from the source to the region of interest plus its lateral inhomogeneity. Additionally, the interaction of the back-scattered waves from the local structure with all heterogeneities outside it can be considered in contrast to the known hybrid two-step techniques.

该项目的目的是开发一种有效的计算地质力学数值工具，用于自然或诱发（由于地热工程）地震活动区域的地震模拟。该方法考虑了以下关键因素：（a）局部地质土层中由于不平行层和地形特征而产生的横向不均匀性;（B）局部地质区和震源所在的半空间呈阶梯状或连续不均匀。本文工作的新奇在于：（a）发展了一种基于绿色函数的连续非均匀半平面的非常规边界元法，并对其进行了验证，将其插入软件中，对不同的地震情景进行了密集的模拟;（B）由于使用了绿色函数，与常规边界元法相比，提高了解的精度，减少了CPU时间和内存;（c）有能力解释三个主要组成部分----震源、从震源到有关区域的不均匀波径，以及其横向不均匀性。此外，与已知的混合两步技术相比，可以考虑来自局部结构的背散射波与其外部的所有不均匀性的相互作用。

项目成果

A non-conventional BEM for seismic wave propagation in continuously inhomogeneous half-plane

连续非均匀半平面地震波传播的非常规边界元法

• DOI: 10.1201/b17017-67
• 发表时间: 2014
• 作者: Fontara;Wuttke;Rangelov;Dineva
• 通讯作者: Dineva

Wave Propagation Due to an Embedded Seismic Source in a Graded Half-Plane with Relief Peculiarities Part I: Mechanical Model and Computational Technique

具有地形特征的分级半平面内嵌入地震源引起的波传播第一部分：力学模型和计算技术

• DOI: 10.1515/jtam-2015-0006
• 发表时间: 2015
• 期刊: Journal of Theoretical and Applied Mechanics
• 影响因子: 0.7
• 作者: Fontara I.-K;Parvanova S;Dineva P;Wuttke F.
• 通讯作者: Wuttke F.

SH‐wave propagation in a continuously inhomogeneous half‐plane with free‐surface relief by BIEM

• DOI: 10.1002/zamm.201300198
• 发表时间: 2015-07
• 期刊: ZAMM ‐ Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik
• 作者: F. Wuttke;I. Fontara;P. Dineva;T. Rangelov