现代地质2012，Vol.26Issue(6)：1193-1198,6.
电磁波场数值计算中时间域有限差分法与时间域伪谱法的对比研究
Study on the Differences Between Finite Difference Time Domain Method and Pseudo-spectral Time Domain Algorithm in Numerical Calculation of Electromagnetic Wave Fields
林树海 1王伟利1
作者信息
- 1. 中国地质大学地球物理与信息技术学院,北京100083
- 折叠
摘要
Abstract
In order to improve the resolution of numerical calculation of electromagnetic wave fields, the differences between finite difference time domain (FDTD) method and psedo-spactral time domain (PSTD) algorithm were studied. The FDTD method is a common numerical calculation method of electromagnetic wave fields, and it is widely applied to the solution of the partial derivative equations related to time. More memory is needed using FDTD method in large-scale numerical calculation. The PSTD algorithm is based on FDTD method and employs fast Fourier transform (FFT) to calculate the spatial derivatives in Maxwell's equations. Due to accuracy by FFT, the calculation precision is improved and grid numbers needed is decreased greatly by using PSTD algorithm. The PSTD algorithm has the advantage of saving computational memory space and is suitable for large-scale numerical calculation of forward modeling and inversion.关键词
数值计算/时间域有限差分法/时间域伪谱法/快速傅里叶变换/精度Key words
numerical calculation/ finite difference time domain method/ pseudo-spectral time domain algorithm/ fast Fourier transform algorithm/ precision分类
天文与地球科学引用本文复制引用
林树海,王伟利..电磁波场数值计算中时间域有限差分法与时间域伪谱法的对比研究[J].现代地质,2012,26(6):1193-1198,6.
