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Up: Kinematic Constraints
Previous: Kinematic Coupling Constraints
Initial conditions are entered as FEMGEN loads via the 'PROPERTY LOAD' or the 'PROPERTY INITIAL' command. The following initial conditions are supported:
Initial Condition Mass Flow Rate
Pore Pressure
Void Ratio
Rotating Velocity
Saturation
Stress
Geostatic Stress
Temperature
Velocity
Fluid Pressure
Note:
The following sections describe the definition of these initial conditions.
There are 3 arguments, at least one of which one must be entered depending on the dimensionality of the elements to which the conditions apply.
Argument(s) Meaning 1 Mass flow rate per unit area (x)
2 Mass flow rate per unit area (y)
3 Mass flow rate per unit area (z)
Example FEMGEN Command:
PROPERTY LOAD I-MFLOW S1 1 2 3
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=MASS FLOW RATE
S1 , 1.000000 , 2.000000 , 3.000000
There is 1 argument, which must be entered.
Argument Meaning 1 Fluid pore pressure
Example FEMGEN Command:
PROPERTY LOAD I-PORE S1 1
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=PORE PRESSURE
S1 , 1.000000
There are 4 arguments, all of which must be entered.
Arguments Meaning 1 First value of void ratio
2 Vertical coordinate for the above value
3 Second value of void ratio
4 Vertical coordinate for the above value
Example FEMGEN Command:
PROPERTY LOAD I-RATIO S1 1 2 3 4
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=RATIO
S1 , 1.000000 , 2.000000 , 3.000000 , 4.000000
There are 10 arguments, all of which must be entered.
Arguments Meaning 1 Angular Velocity about axis a b.
2 Global x-component of translational velocity
3 Global y-component of translational velocity
4 Global z-component of translational velocity
5 Global x-component of point a
6 Global y-component of point a
7 Global z-component of point a
8 Global x-component of point b
9 Global y-component of point b
10 Global z-component of point b
Example FEMGEN Command:
PROPERTY LOAD I-RVEL S1 1 2 3 4 5 6 7 8 9 10
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=ROTATING VELOCITY
S1 , 1.000000 , 2.000000 , 3.000000 , 4.000000
5.000 , 6.000 , 7.000 , 8.000 , 9.000 , 10.00
There is 1 argument, which must be entered.
Arguments Meaning 1 Saturation value
Example FEMGEN Command:
PROPERTY LOAD I-SATUR S1 1
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=SATURATION
S1 , 1.000000
There are 6 arguments, at least one of which must be entered depending upon the number of stress components which are applicable to the elements to which the conditions apply.
Arguments Meaning 1 First stress component
2 Second stress component
3 Third stress component
4 Fourth stress component
5 Fifth stress component
6 Sixth stress component
Example FEMGEN Command:
PROPERTY LOAD I-STRESS S1 1 2 3 4 5 6
Corresponding ABAQUS Input File:
*INITIAL CONDITIONS, TYPE=STRESS
S1 , 1.00 , 2.00 , 3.00 , 4.00 , 5.00 , 6.00
There are 6 arguments, all of which must be entered.
Arguments Meaning 1 First value of vertical component of effective stress
2 Vertical coordinate for the above value
3 Second value of vertical component of effective stress
4 Vertical coordinate for the above value
5 Coefficient of lateral stress (x-direction)
6 Coefficient of lateral stress (y-direction)
Example FEMGEN Command:
PROPERTY LOAD I-GSTRES S1 1 2 3 4 5 6
Corresponding ABAQUS Input File:
*INITIAL CONDITIONS, TYPE=STRESS, GEOSTATIC
S1 , 1.00 , 2.00 , 3.00 , 4.00 , 5.00 , 6.00
There are 7 arguments, of which at least one must be entered. Multiple temperature values are used in association with beam section points and through-thickness shell locations.
Arguments Meaning 1 Temperature
2 Temperature
3 Temperature
4 Temperature
5 Temperature
6 Temperature
7 Temperature
Example FEMGEN Command:
PROPERTY LOAD I-TEMP S1 1 2 3 4 5
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=TEMPERATURE
S1 , 1.000000 , 2.000000 , 3.000000 , 4.000000 , 5.000000
There are 2 arguments, both of which must be entered.
Arguments Meaning 1 Velocity
2 Degree of Freedom
Example FEMGEN Command:
PROPERTY LOAD I-VEL S1 50 1
Corresponding ABAQUS Input File:
*NSET, NSET=S1
1 2 3 4 5 6 7 8 9 10 11
*INITIAL CONDITIONS, TYPE=VELOCITY
S1 , 1, 50.00000
There is 1 argument, which must be entered.
Argument Meaning 1 Fluid pressure
Example FEMGEN Command:
PROPERTY LOAD I-PRES P1 1
Corresponding ABAQUS Input File:
*NSET, NSET=P1
1
*INITIAL CONDITIONS, TYPE=FLUID PRESSURE
P1 , 1.000000
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