二维圆柱坐标下FDTD法对多频电磁波测井的数值模拟

被引:7
作者
刘四新
机构
[1] 吉林大学地球探测科学与技术学院吉林长春
基金
教育部留学回国人员科研启动基金;
关键词
麦克斯韦方程; 时间域有限差分; 多频电磁波测井;
D O I
10.13278/j.cnki.jjuese.2004.02.024
中图分类号
P631.813 [];
学科分类号
摘要
在介质围绕Z轴旋转对称的情况下,三维直角坐标下的麦克斯韦方程可变成两组分别对应TM波和TE波的二维柱坐标下的偏微分方程。采用线圈作为电磁波测井的发射器和接收器的时候,可采用TE波对应的方程,这时相当于磁极子的情况。而采用电偶极子作为发射和接收器的时候,则对应TM波的方程。采用时间和空间均为二阶精确的有限差分方法,将偏微分方程进行差分化。这样,空间的电磁场可由时间域有限差分法(FDTD)来求解。
引用
收藏
页码:283 / 286
页数:4
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