瞬變電磁快速三維正演
發(fā)布時間:2018-10-10 12:24
【摘要】:為了提高瞬變電磁法三維正演計算速度,一方面,采用矢量有限單元法與積分方程法相混合,使24維單元矩陣的階數(shù)降低到12維,減少大型稀疏矩陣的計算時間,同時增強邊界條件的連續(xù)性,避免出現(xiàn)偽解;另一方面,引進Flow-through Hankel transform快速計算技術(shù),解決不同收發(fā)距的貝塞爾函數(shù)重復計算的問題,進一步節(jié)省計算時間。研究結(jié)果表明:引入矢量有限單元法的混合法和Flow-through Hankel transform快速計算技術(shù)不但能保證3維計算精度,而且能提高計算速度。
[Abstract]:In order to improve the speed of 3D forward calculation of transient electromagnetic method, on the one hand, the vector finite element method and integral equation method are used to reduce the order of 24 dimensional element matrix to 12 dimension and to reduce the computing time of large sparse matrix. At the same time, the continuity of boundary conditions is enhanced to avoid the false solution. On the other hand, the problem of repeated calculation of Bessel function with different transceiver distance is solved by using Flow-through Hankel transform fast computing technology, and the computation time is further saved. The results show that the hybrid method of vector finite element method and Flow-through Hankel transform fast computing technique can not only guarantee the accuracy of 3D calculation, but also improve the calculation speed.
【作者單位】: 中南大學地球科學與信息物理學院;中南大學海洋礦產(chǎn)探測技術(shù)與裝備研究所;
【基金】:大洋“十二五”重大項目(DY125-11-R-03) 國家自然科學基金資助項目(41304090) 深圳市戰(zhàn)略新興產(chǎn)業(yè)發(fā)展專項資金資助項目(CXZZ20120618165608947)~~
【分類號】:P631.325
[Abstract]:In order to improve the speed of 3D forward calculation of transient electromagnetic method, on the one hand, the vector finite element method and integral equation method are used to reduce the order of 24 dimensional element matrix to 12 dimension and to reduce the computing time of large sparse matrix. At the same time, the continuity of boundary conditions is enhanced to avoid the false solution. On the other hand, the problem of repeated calculation of Bessel function with different transceiver distance is solved by using Flow-through Hankel transform fast computing technology, and the computation time is further saved. The results show that the hybrid method of vector finite element method and Flow-through Hankel transform fast computing technique can not only guarantee the accuracy of 3D calculation, but also improve the calculation speed.
【作者單位】: 中南大學地球科學與信息物理學院;中南大學海洋礦產(chǎn)探測技術(shù)與裝備研究所;
【基金】:大洋“十二五”重大項目(DY125-11-R-03) 國家自然科學基金資助項目(41304090) 深圳市戰(zhàn)略新興產(chǎn)業(yè)發(fā)展專項資金資助項目(CXZZ20120618165608947)~~
【分類號】:P631.325
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