一种混合时域有限差分方法  

A Hybrid Finite-difference Method in Time-domain

作　　者：兰康[1] 赵愉深[1] 林为干[1] 

机构地区：[1]成都电子科技大学应用物理所

出　　处：《电子科技大学学报》1996年第4期394-397,共4页Journal of University of Electronic Science and Technology of China

摘　　要：给出一种基于ＦＥ－ＴＤ方法和Ｄｕｆｏｒｔ－Ｆｒａｎｋｌｅ有限差分方法的混合数值算法，以计算不均匀导电大地层中的瞬态电磁场。该法提供了一种用于模拟具有任意时间波形的电磁脉冲在大地深层的传播的方法，且所需ＣＰＵ时问比ＦＤ－ＴＤ法少得多。通过与ＦＤ－ＴＤ法比较，证明了该方法的可靠性。A hybrid numerical method based on FD-TD method and Dufort-Frankle finite-difference method is used to calculated transient electromagnetic fields in inhomogeneus conducting earth. FD-TD formulas are used to simulate the exciting wave,and the diffusion equation solved by Dufort-Frankle finite-difference method is used to simulate EM fields in conducting earth. It provides an effective scheme to model the propagation of EM pulses with arbitrary time dependence in a deep conducting earth,and needs less CPU time than pure FD-TD method. This method is verified by comparing itS results with that of FD-TD method.

关 键 词：时域有限差分法 电磁脉冲 电磁散射 

分 类 号：TN01[电子电信—物理电子学] O451[理学—无线电物理]