时间域航空电磁响应数值模拟的精度分析

摘要

分析说明了G⁃S变换和汉克尔变换的计算精度，当n＝12或16时，G⁃S变换适用范围广且能保证精度；而汉克尔变换计算的相对精度达到10－6数量级；并且基于时间域航空电磁法偶极—偶极装置一维正演算法，在选取不同参数时，对航空电磁响应数值模拟精度进行了分析。结果表明G⁃S变换n值的选取对计算精度影响相对较大，而汉克尔变换中滤波参数的选取对计算精度影响较小。%This paper has analyzed the calculation precision of G⁃S transformation and Hankel transformation, when n = 12 or 16, G⁃S transform applicability is wide and can assure accuracy, and the relative accuracy of Hankel transform is up to 10-6 orders. Based on time⁃domain airborne electromagnetic method in time domain and dipole⁃dipole device 1⁃D forward modeling algorithm, , the authors analyzed the precision of response to airborne electromagnetic wave when different parameters were selected. The results show that the G⁃S transformation value of an influence on calculation accuracy is considerable, and selection of parameters of Hankel transformation filtering has small effects on calculation accuracy.