Data Structure: Geometry_section_surface |
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Description |
Defines data to split surfaces with a surface section |
Usage |
Geometry_section_surface NUM=ival where ival is the data structure number |
Description |
Overview Defines data create a section through a 3-D model that may be used to (see Generation_type): •Generate section data and create a 2-D .geo and .dat file ('Section') •Add section geometry to a 3-D model by splitting current volumes ('Add_geometry') •Split a 3-D model removing geometry on one side of the section defined by Split_geomety_flag ('Split')
The section type ( Section_type) may be defined as: •"XY_plane" - a flat surface aligned to the X-Y plane at the reference Z-ordinate defined using Reference_location •"YZ_plane" - a flat surface aligned to the Y-Z plane at the reference X-ordinate defined using Reference_location •"ZX_plane" - a flat surface aligned to the X-Z plane at the reference Y-ordinate defined using Reference_location •"XY_local" - a flat plane aligned to the X-Y plane of the assigned coordinate system and passing through the reference location •"YZ_local" - a flat plane aligned to the X-Y plane of the assigned coordinate system and passing through the reference location •"ZX_local" - a flat plane aligned to the X-Y plane of the assigned coordinate system and passing through the reference location •"XY_path" - a vertical section along a non-flat X-Y path defined via Path_coordinates.
For flat plane Reference coordinates for the section surface are defined using Reference_location, whereas for section type "XY_path" the path is defined using Path_coordinates.
A list of formation units, element groups or volumes may be defined rather than applying the section to the complete model; e.g. for creation of a 2-D model containing a limited selection of formation units. The section may also be limited in lateral extent by specifying the Section_length. In this case the section is assumed to start at either the Reference_location , or the first point on the Path_coordinates.
The orientation of the section is set automatically and can be reversed if required by specifying the Section_reversal_flag. |
Section_type Type of section |
Generation_type Type of section generation |
Split_geometry_flag Flag defing section is being used to split a 3-D model |
Reference_location Ordinate or coordinates of reference point |
Path_coordinates Path coordinates |
Path_filename File name containing path coordinates |
Units List of unit names (Compulsory) |
Group_numbers List of element group numbers for surface section operation (optional) |
Groups List of element group names for surface section operation (optional) |
Volumes List of volumes for surface section operation (optional) |
Coordinate_system Coordinate system defining a plane |
Output_level Defines output to the log file for the conversion process |
Short_line_tolerance Tolerance for creating short lines (Optional) |