瞬变电磁场响应计算的频—时域转换方法综述

Review of Frequency-Domain and Time-Domain Transformation Method in Transient Electromagnetic Field Response Computation

瞬变电磁场响应的计算一般有两种途径:在时间域求解或在频率域求解,然后把计算结果转换到时间域。本文回顾与评述了国内外瞬变电磁场响应计算的频—时域转换方法。迄今,国内外发展起来的频-时域转换方法主要有:傅立叶变换法、延迟谱方法、Gaver-Stehfest逆拉氏变换方法、数字滤波方法等。在详细阐述上述几种方法的基础上,针对不同的频-时域转换方法的计算精度和速度问题进行了比较,对其方法的优劣进行了总结与评述。

There are two ways used for the transient electromagnetic field response＇s computation in the domestic and foreign, computation in time domain or solution in frequency domain, and then the result is transformed to the time domain. The main method which transforms to the time domain response from the frequency domain includes： the Fourier transformation, the postponed spectrum method, Gaver-Stehfest inverse Laplace transform, the digital filter method, and so on. The paper elaborates the above several methods and makes a comparison of the different frequency - time domain transformation methods on the computational accuracy and the speed, and then makes a summary.