Display the pore pressure field editor using one of the following
methods:
-
To create a new pore pressure field, follow the procedure outlined
in
Creating predefined fields
(Category: Other;
Types for Selected Step: Pore
pressure). You can create a pore pressure field only during
the initial step.
-
To edit an existing pore pressure field using menus or managers,
see
Editing step-dependent objects.
You can modify a pore pressure field only during the initial step.
Click the arrow to the right of the Point 1
distribution field, and select the option of your choice from the
list that appears:
-
Select Uniform to define a pore pressure that
is uniform for the selected region.
-
Select From output database file to read pore
pressure values from the output database file of a previous
Abaqus
analysis with pore pressure components.
-
Select User-defined to specify pore pressure
output using options in user subroutine
UPOREP. See the following sections for more information:
-
Select an analytical field to define a spatially varying initial
pore pressure. Alternatively, you can click
to create a new analytical field. (See
The Analytical Field toolset
for more information.)
For uniform distributions, do the following:
-
From the Elevation distribution options,
select either Linear or Constant.
-
In the Pore pressure 1 field, specify the
initial pore pressure in the first region in your model.
-
If you selected an elevation distribution that varies linearly,
specify the following options:
-
In the Vertical coordinate 1 field,
specify the vertical position of the first location in your model for which you
are specifying initial pore pressure.
-
In the Point 2 distribution field,
specify either a Uniform distribution for pore pressure at
the second elevation or select an analytical field to define a spatially
varying initial pore pressure at the second elevation. If you select
Uniform, specify the pore pressure and vertical position
of the second location in your model.
If you are specifying pore pressure output from an output database
file, do the following:
-
Specify the file name from which you want to import pore pressure
values.
-
From the Step options, either select
Last to read pore pressure output from the last step of
the output database or select Specify and enter the number
of the step from which you want to read pore pressure data
-
From the Increment options, either select
Last to read pore pressure output from the last increment
of the selected step or select Specify and enter the
number of the increment from which you want to read pore pressure data.
-
Toggle on Interpolate midside nodes to
interpolate pore pressure values between dissimilar meshes.
For user-defined pore pressure distributions, do the following:
-
Enter the
Job module,
and display the job editor for the analysis job of interest. (For more
information, see
Creating, editing, and manipulating jobs.)
-
In the job editor, click the General tab, and
specify the file containing the user subroutine that defines the predefined
field. For more information, see
Specifying general job settings.
Note:
You can specify only one user subroutine file in the job editor;
if your analysis involves more than one user subroutine, you must combine the
user subroutines into one file and then specify that file.
Click OK to create the pore pressure field and
to close the dialog box.
Magenta squares appear on the model representing the initial pore
pressure field that you just created.
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