本文選題：重力數(shù)據(jù) + 軸約束　； 參考：《中國地質大學(北京)》2015年碩士論文

【摘要】：聚焦反演的根本思想是在反演過程中加入最小體積、最小轉動慣量等約束條件,使得反演結果異常集中分布在一定的范圍內,從而能夠更清晰地反映地質體的密度分界面,更準確的確定異常體大小和位置。本文首先對位場反演方法原理進行基礎性研究,實現(xiàn)當前常用的基于光滑約束、深度加權約束的反演算法,實現(xiàn)加入最小體積、最小轉動慣量等約束條件時的聚焦反演算法,通過對比聚焦反演與光滑反演的效果,更深入的了解了不同方法反演結果的特點。此外,基于聚焦反演的基本理論,引入深度加權約束,改善了聚焦反演效果,并在最小轉動慣量約束聚焦反演的基礎上對軸約束聚焦反演進行了深入研究,實現(xiàn)了多軸和有限長軸約束聚焦反演。最后,通過理論模型測試,對比不同軸約束條件下的重力數(shù)據(jù)聚焦反演結果,從模型剖分大小、約束軸參數(shù)、約束軸個數(shù)和約束軸長度四個方面研究了軸約束聚焦反演的優(yōu)點與不足,為能夠更合理、有效的使用軸約束重力數(shù)據(jù)聚焦反演方法提供有力的依據(jù)。
[Abstract]:The basic idea of focusing inversion is to add the minimum volume, minimum moment of inertia and other constraints in the inversion process, so that the inversion results are concentrated in a certain range, so that the density interface of the geological body can be reflected more clearly. Determine the size and location of the exception more accurately. In this paper, the principle of potential field inversion method is studied at first, and the inversion algorithm based on smooth constraint and depth weighted constraint is realized, and the focusing inversion algorithm with minimum volume, minimum moment of inertia and other constraints is realized. By comparing the effect of focus inversion and smooth inversion, the characteristics of different inversion results are further understood. In addition, based on the basic theory of focusing inversion, depth weighting constraints are introduced to improve the effect of focusing inversion, and the axial constraint focusing inversion is deeply studied on the basis of minimum moment of inertia constraint focusing inversion. Multi-axis and finite-axis constrained focusing inversion is realized. Finally, through the theoretical model test, the results of gravity data focusing inversion under different axial constraints are compared, and the size of the model and the constraint axis parameters are divided from the model. The advantages and disadvantages of axial constrained focusing inversion are studied from four aspects: the number of constraint axes and the length of constraint axes, which provides a powerful basis for the more reasonable and effective use of axial constrained gravity data focusing inversion methods.
【學位授予單位】：中國地質大學(北京)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P631.14

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相關期刊論文 前1條

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本文編號：2101807