物探化探计算技术
物探化探計算技術
물탐화탐계산기술
COMPUTING TECHNIQUES FOR GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2014年
4期
394-400
,共7页
任意形状源%积分方程%多次激发%三维电磁场%反演
任意形狀源%積分方程%多次激髮%三維電磁場%反縯
임의형상원%적분방정%다차격발%삼유전자장%반연
arbitrary source%integral equation%multiple excitation%3D EM%invert
利用积分方程和阻尼最小二乘法，对任意形状源多个位置激发下三维异常体的电磁场进行了反演计算。计算中将任意形状源条件下多组激发点和接收点的电磁场数据统一考虑，求出了此种条件下的雅克比矩阵，反演得到了地下异常体的电阻率分布。模型试算结果表明，反演收敛速度快，对初值依赖性小，结果准确可靠。
利用積分方程和阻尼最小二乘法，對任意形狀源多箇位置激髮下三維異常體的電磁場進行瞭反縯計算。計算中將任意形狀源條件下多組激髮點和接收點的電磁場數據統一攷慮，求齣瞭此種條件下的雅剋比矩陣，反縯得到瞭地下異常體的電阻率分佈。模型試算結果錶明，反縯收斂速度快，對初值依賴性小，結果準確可靠。
이용적분방정화조니최소이승법，대임의형상원다개위치격발하삼유이상체적전자장진행료반연계산。계산중장임의형상원조건하다조격발점화접수점적전자장수거통일고필，구출료차충조건하적아극비구진，반연득도료지하이상체적전조솔분포。모형시산결과표명，반연수렴속도쾌，대초치의뢰성소，결과준학가고。
3D abnormal body's electromagnetic field with arbitrary shape source multiple locations excitation can be inverted u-sing integral equation and damped least squares.Multiple groups of electromagnetic field data in different excitation and receiv-ing point to be uniform consideration in inversion,a matrix is obtained,distribution of resistivity of underground abnormal body is achieved.Model test shows that inversion of fast convergence speed,less dependent on the initial value,the result is accurate and reliable.
