A natural electric field three-dimensional multidirectional mapping coupling numerical simulation method

A numerical simulation, three-dimensional multi-directional technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficulty in simulation, save computer time, save running memory, and ensure calculation accuracy.

Pending Publication Date: 2019-05-10
CENT SOUTH UNIV
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Problems solved by technology

For the numerical simulation of the natural electric field, the natural electric field sources have regional distribution characteristics, and most of them are dynamic, so it is difficult to achieve accurate and effective simulation by conventional numerical simulation methods

Method used

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  • A natural electric field three-dimensional multidirectional mapping coupling numerical simulation method
  • A natural electric field three-dimensional multidirectional mapping coupling numerical simulation method
  • A natural electric field three-dimensional multidirectional mapping coupling numerical simulation method

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Experimental program
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Effect test

Embodiment 1

[0045] S1, such as figure 1 As shown, the seepage model of complex terrain is constructed by using the tool software in the computer.

[0046] In the complex terrain seepage model, the finite element area is divided into 60×60×40 hexahedral grid units. The model has two layers, the finite element area scale is set to 90m×90m×110m, the thickness of the surface cover layer is set to 10m, the resistivity is set to 200Ω·m, and the resistivity of the bedrock at the bottom is set to 1000Ω·m. Terrain data such as figure 2 , set three dominant flow channels according to the terrain change, the seepage channels are all located in the X-axis main section, in which channels 1 and 3 are inclined to the middle of the section, channel 2 is kept upright, the lateral dimension of the seepage channel is 0.5m×0.5m, and the resistivity is 20Ω·m.

[0047] S2. Construct the boundary value problem of seepage model in complex terrain. like image 3 As shown, it is a traditional finite element ...

Embodiment 2

[0119] The difference between embodiment 2 and embodiment 1 is that in embodiment 2, a dynamic seepage model of a landfill is constructed.

[0120] In the dynamic seepage model of the landfill, the finite element area is divided into 60×60×40 hexahedral grid units. The finite element area scale is 90m×90m×110m, the landfill is located in the middle of the model, and the landfill space is 20m×20m×10m. The thickness of the surface covering layer is 1m, the resistivity is 200Ω·m, and the resistivity of the surrounding rock is 1000Ω·m. The anti-seepage wall is composed of multi-layer anti-seepage materials such as concrete and anti-seepage membrane, the thickness is set to 1m, and the comprehensive resistivity is 5000Ω·m. The resistivity of the landfill area is 50Ω·m, and the resistivity of the leachate is 5Ω·m. The leakage port is located at the intersection of the main section of the X-axis, the bottom plate of the anti-seepage wall and the positive anti-seepage wall of the X-...

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Abstract

The invention belongs to the technical field of natural electric field numerical simulation methods, and particularly relates to a natural electric field three-dimensional multidirectional mapping coupling numerical simulation method. The method comprises the following steps: S1, establishing a natural electric field electric model, wherein the regional subdivision of the model comprises a finiteelement and an infinite element; S2, constructing an edge value problem of the model; S3, constructing a functional for the edge value problem and solving variations of the functional; S4, starting from the variation problem, performing unit analysis on the finite element and the infinite element respectively, and solving to obtain a finite element stiffness matrix and an infinite element stiffness matrix; S5, assembling the finite element stiffness matrix and the infinite element stiffness matrix to obtain a total stiffness matrix; and S6, obtaining the potential value of each node in the natural electric field electric model through the total stiffness matrix. According to the method, the numerical calculation precision is improved while unit subdivision is reduced, the number of calculation times of the total stiffness matrix is reduced to improve the calculation efficiency of numerical simulation, and accurate and effective numerical simulation of the multi-source dynamic natural electric field is achieved.

Description

technical field [0001] The invention belongs to the technical field of natural electric field numerical simulation methods, in particular to a natural electric field three-dimensional multi-directional mapping coupling numerical simulation method. Background technique [0002] In underground pollution or groundwater monitoring, geophysical methods are increasingly used to replace traditional underground pollution or groundwater monitoring methods such as borehole testing and regular sampling analysis due to their obvious advantages of low cost and high efficiency. [0003] Among them, the field observation of the natural electric field method is particularly fast and convenient, and it is very sensitive to signals such as groundwater seepage, pollutant diffusion, ion migration, redox reaction, etc., and is especially suitable for the detection and monitoring of underground pollution and groundwater. [0004] Carrying out the numerical simulation of natural electric field in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 崔益安谢静柳建新张丽娟阳兵
Owner CENT SOUTH UNIV
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