Spatial_boundary
Contents
Data Structure: Spatial_boundary |
|
Description |
data structure |
Usage |
Spatial_boundary NUM=ival where ival is the data structure number |
Description |
Overview The Spatial_boundary data structure can be used to define displacement, pore pressure and temperature boundary conditions for the model via spatial grids. This feature is used in the Submodeling workflow, where the small scale run uses previously exported spatial grids with data from the large scale model to define its boundary conditions. In addition it should be noted that Spatial_boundary can be used to prescribe values displacements, pore pressure or temperature via spatial grids as a function of time.
|
 | Name Name of spatial_boundary set |
Usage |
||||
|
||||
Description |
||||
Name of spatial boundary set (Maximum Characters 32)
|
| File_name Input file name |
Usage |
||||
|
||||
Description |
||||
Input file name. If defined then the spatial grids or geometry sets will be imported from this file (Maximum Characters 128)
|
| Value_type Defines if the boundary data is absolute or incremental |
Usage |
||||
|
||||
Description |
||||
Type defines whether the spatial boundary values are defined via absolute values or via multipliers. Valid data are: • "Absolute" - spatial boundary values correspond to the property value (Default) • "Relative" - spatial boundary values are relative to the current values and define the change in value.
Notes •If not specified the default is "Absolute"
|
| Value_update_type Defines the value update type for multiple declaration in spatial boundaries |
Usage |
||||
|
||||
Description |
||||
If a value is defined in more than one spatial boundary then the update rules are: • "Add" - Accumulate the values • "Max" - Use the maximum value • "Min" - Use the minimum value • "Overwrite" - Use the last value (default)
|
| Conforming_mesh_flag Flag defining mesh conformity type |
Usage |
||||
|
||||
Description |
||||
Valid values of the Conforming_mesh_flag are: • 0 - Arbitrary grid is used to define the values that will be prescribed using the Spatial_boundary • 1 - The spatial grids containing the values to be prescribed are defined on a nodal or element basis where the nodes correspond to the mesh (default)
|
| Time_curve Time curve name or number |
Usage |
||||
|
||||
Description |
||||
Assigns a time curve (by name or number) for applying the spatial values specified on the grids. The time curve is only required if the grid data is not assigned by spatial values at specific times; e.g. for geostatic initialisation
|
| Relative_time_curve Flag indicating that time curve should be set to correspond to the duration of the stage |
Usage |
||||
|
||||
Description |
||||
Flag indicating that time curve should be set to correspond to the duration of the stage. Valid values are: • 0 - Do not scale time curve • 1 - Scale time curve relative to stage (default) or create a ramp load correspond to the stage time • 2 - Create an s curve load correspond to the stage time
|
| Geometry_sets List of geometry sets |
Usage |
|||||||||||||||
|
|||||||||||||||
Description |
|||||||||||||||
Defines a list with the model boundary geometry set names which will be assigned the spatial boundary. This may be used to facilitate prescribed displacements in models with not-flat/non-regular boundaries (e.g. ragged boundaries). Allowed names for assigned geometry sets are: • Base - Base of model • Top - Top surface of model • North - North Side Boundary • South - South Side Boundary • East - East Side Boundary • West - West Side Boundary
|
|||||||||||||||
| Mapping_entity_flag Mapping entity flag |
Usage |
||||
|
||||
Description |
||||
The mapping entity flag defines whether the values from the spatial grid should be mapped to the complete domain without taking into account any geometry entity restriction or the values should be mapped following a one-to-one correspondence on a geometry entity basis (Surfaces in 2D, Volumes in 3D) from the Geometry_entity data within the Spatial_grid_group to the corresponding entity defined in Mapping_entity_list. Valid values are: • 0 - Mapping_entity_list applies to complete set (default) • 1 - Use a one-to-one correspondence to map data on an entity-by-entity basis
|
| Spatial_grids List of Spatial grids |
Usage |
|||||||||||||||
|
|||||||||||||||
Description |
|||||||||||||||
Defines a list with the names of the spatial grids that will define boundary conditions for the simulation.
|
|||||||||||||||
| Parameterised_boundaries List of parameterized boundaries |
Usage |
|||||||||||||||
|
|||||||||||||||
Description |
|||||||||||||||
Defines a list with the numbers of the parameterized boundaries that will define boundary conditions for the simulation.
|
|||||||||||||||
| Prescribed_components Prescribed components associated with each spatial grid |
Usage |
|||||||||||||||
|
|||||||||||||||
Description |
|||||||||||||||
Defines the list of prescribed components for each spatial grid. Valid values are: •0 - not prescribed •1 - prescribed displacement in X direction •2 - prescribed displacement in Y direction •3 - prescribed displacement in Z direction •4 - prescribed pore pressure at nodes •5 - prescribed temperature at nodes •6 - prescribed pore pressure at element centres •7 - prescribed temperature at element centres •8 - prescribed porous fluid flow normal to the basal boundary •9 - prescribed thermal flux normal to the basal boundary
For example: Spatial_grids IDM =2 "Base" "West" Prescribed_components IDM =2 JDM =2 1 3\"Prescribe X and Z using grid Base"\ 1 0\"Prescribe X only using grid West"\
|
|||||||||||||||
| Displacement_system Flag defining whether displacements are defined in the global or local coordinates system |
Usage |
||||
|
||||
Description |
||||
Displacement_system allows definition of whether the boundary displacements are in the global or local nodal coordinate system. By default the displacements are assumed to be in the global coordinate system, even when transformed freedoms are defined for the boundary nodes. Valid values are: • "Global" - Global coordinate system (default) • "Local" - Local coordinate system defined by transformed freedoms
|
| Pore_pressure_nodal_flag Flag defining method of nodal pore pressure update for mechanical only analysis |
Usage |
||||
|
||||
Description |
||||
Flag defining method of nodal pore pressure update for mechanical only analysis. Valid values are: • 0 - Values not specified are assumed to be values unchanged from time t (Default). Note that for this option the grid value type ( Value_type ) must be "Absolute" for all grids • 1 - Values not specified will be either prescribed elsewhere or zero
|