吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (2): 411-419.doi: 10.13278/j.cnki.jjuese.20170061
李建平, 翁爱华, 李世文, 李大俊, 李斯睿, 杨悦, 唐裕, 张艳辉
Li Jianping, Weng Aihua, Li Shiwen, Li Dajun, Li Sirui, Yang Yue, Tang Yu, Zhang Yanhui
摘要: 为了计算全球尺度电磁感应的响应,本文介绍地磁测深频率域三维正演。正演算法采用球坐标系下的交错网格有限差分方法,从Maxwell方程的积分形式出发,采用PARDISO对离散后的方程组求解,避免了迭代求解的散度校正。为了验证本文结果的正确性和精度,与前人的有限元和有限差分方法进行了对比,一维层状模型的三维交错网格有限差分数值结果和解析解相对误差小于5%,双半球模型的计算结果与前人的计算结果完全吻合。三维"棋盘模型"计算表明磁场分量对异常体的大小和位置具有很好的分辨能力。
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