【摘要】 本文探讨了将商业有限元软件COMSOL Multiphysics应用于地震电信号选择性三维数值模拟方面可能面临的一些问题.在检验算法可靠性的同时,通过选取不同类型的边界条件、不同大小的计算区域、不同的介质电性参数以及地表介质电性非均匀性和地下特定导电通道等不同电性结构模型等,考察了影响地震电信号选择性数值模拟结果的一些可能因素.结果表明,在开展地震电信号选择性数值模拟研究时需对模型参数的选取进行必要的分析,而地表介质电性非均匀性以及地下特定导电通道等可以较好地解释地震电信号选择性现象,其贡献的大小与模型具体的电性结构和对比度等参数有关.更多还原

【Abstract】 We discuss the possible application of the COMSOL Multiphysics, a commercial finite element method (FEM) software, to 3D numerical simulation of seismic electric signal (SES). After validation test of the FEM software, we investigate the possible influences in numerical simulation of SES, by adopting different types of boundary condition, varied size of calculated region, various combinations of electrical parameters of the media, and various models including surface inhomogeneity of resistivity or underground conductive channel.The preliminary results showed that care should be taken for the selection of model parameters in numerical simulation of SES.Selectivity phenomena of SES may be caused either by surface inhomogeneity of resistivity or by underground conductive channel, depending on the detailed electric structure and contrast of resistivity in the model.更多还原