本文選題：瞬變電磁法　切入點：瞬變電磁矩變換　出處：《地球物理學(xué)報》2016年11期 　論文類型：期刊論文

【摘要】：瞬變電磁法的嚴(yán)格三維反演計算復(fù)雜、占用資源多,在普通計算機(jī)上難以實現(xiàn).本文引入瞬變電磁矩變換的概念,提出一種快速三維反演方法.該方法基于阻性限制(resistive limit)特性,建立包含異常體的三維大地的一階矩響應(yīng)正演算法,根據(jù)不同約束條件,選擇優(yōu)化的最速下降法實現(xiàn)瞬變電磁快速三維反演.文中通過含異常體的三維大地正演一階矩與仿真數(shù)據(jù)一階矩的對比,驗證了快速三維正演算法的有效性,之后在不同約束條件下,利用優(yōu)化的最速下降法實現(xiàn)了對含噪聲的仿真瞬變電磁數(shù)據(jù)的快速三維反演.結(jié)果表明,該方法能夠在普通計算機(jī)上短時間內(nèi)較為準(zhǔn)確地反演出地下異常體的體積和位置,在瞬變電磁數(shù)據(jù)的實時解釋工作中具有良好的應(yīng)用前景.
[Abstract]:The strict 3D inversion of transient electromagnetic method is complicated, takes up more resources, and is difficult to be realized on ordinary computer. This paper introduces the concept of transient electromagnetic moment transform and presents a fast 3D inversion method. The method is based on resistive limiting property. The first-order moment response forward algorithm for 3D geodetic with abnormal body is established, and according to different constraint conditions, the first order moment response forward algorithm is established. The optimal steepest descent method is chosen to realize the fast 3D inversion of transient electromagnetic. The validity of the fast 3D forward algorithm is verified by comparing the first order moment of 3D geodetic forward modeling with the first order moment of simulation data. Then, under different constraint conditions, a fast 3D inversion of simulated transient electromagnetic data with noise is realized by using the optimal steepest descent method. The results show that, This method can accurately reverse the volume and position of the underground abnormal body in a short time on the ordinary computer, and has a good application prospect in the real-time interpretation of transient electromagnetic data.
【作者單位】： 中國科學(xué)院電磁輻射與探測技術(shù)重點實驗室;中國科學(xué)院大學(xué);
【基金】：國家重大科研裝備研制項目(ZDYZ2012-1-03-01)資助
【分類號】：P631.325

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本文編號：1631692