Fig 1.
Connected grid and unconnected grid.
The red point A and red line segment BC in (b) and (c) of the figure are connected points and lines.
Fig 2.
Connected closed sector and open sector.
Where the red points M and N are the incident vertices.
Fig 3.
Several common non-manifold forms.
Fig 4.
Spatial relationship of the grid of intersecting fault surfaces.
The red boxed part is the map after the fault slip, and the right figure shows its enlarged part.
Fig 5.
Grid spatial relationship between faults and stratigraphy.
The right figure shows the enlarged view in the red box.
Fig 6.
Spatial relationship between geotechnical interface and geological interface of fault zone.
Fig 7.
Spatial relationship between geotechnical interface and geological interface of fault zone.
Fig 8.
Constraint processing of intersecting faults and stratigraphic grid.
The bottom right corner shows the enlarged part of the red box. The black line indicates the intersection line of the two faces, and the white dots indicate the required corresponding topology line of the face, we can judge whether the current topology of the two faces is consistent or not based on the white dots.
Fig 9.
Confined processing of the geological interface between the range grid and the fault zone.
The bottom right corner shows the enlarged part of the red box. The black line indicates the intersection line of the two faces, and the white dots indicate the required corresponding topology line of the face, we can judge whether the current topology of the two faces is consistent or not based on the white dots.
Fig 10.
Several tetrahedral elements with poor shape quality.
Fig 11.
Triangle optimization pseudo-code.
Fig 12.
Comparison chart before and after grid optimization (partial).
Fig 13.
Topology adjustment before and after topology adjustment.
The dashed box shows the comparison before and after topology modification.
Fig 14.
TetGen library for optimizing tetrahedral pseudo-code.
Fig 15.
Tetrahedral optimization of the TetGen library to solve local optimum pseudo-code.
Fig 16.
Tetrahedral solid model generated by closed-connected mesh.
Fig 17.
Workflow for conversion to finite element mesh using Ansys.
Table 1.
Lithological information table.