Release 11.0 Documentation for ANSYS
www.kxcad.net Home > CAE Index > ANSYS Index > Release 11.0 Documentation for ANSYS
PCONV, TOLER, Item, Comp, NODE, Surf
Sets convergence values for p-method solutions.
MP ME ST PR PRN <> <> FL EM <> <> PP <>
Tolerance (as a percentage) used for convergence checking. The analysis is considered to be converged if the values of all specified items change by less than TOLER at the end of a p-loop. Defaults to 5. If TOLER = STAT, list the currently specified p-convergence criteria. If TOLER = ERASE, erase all p-convergence specifications. If TOLER = DELE, delete only the tolerance for the specification denoted by the Item, Comp, NODE.
Convergence based on (Valid component labels are described in PCONV - Valid Item and Component Labels below):
SE | — | Strain energy or stored electrostatic energy (default). Does not require a component label. |
S | — | Stress. |
EPEL | — | Strain. |
U | — | Translational displacement. |
ROT | — | Structural rotation. (Valid only for SHELL150.) |
VOLT | — | Electric potential. |
EF | — | Electric field strength. |
D | — | Electric flux density. |
EFORC | — | Global electrostatic (Maxwell Stress Tensor) force. |
Component of the Item. (Not required for Item = SE, VOLT, or EFORC). If Item = S or EPEL, Comp defaults to EQV; if Item = U, ROT, EF, or D, Comp defaults to SUM. Valid component labels for each Item are described in PCONV - Valid Item and Component Labels below.
Node number where convergence checking is to be performed. Valid only for Item = S, EPEL, U, ROT, VOLT, EF, or D. For valid Item labels, a node number must be entered in this field. If NODE = P, graphical picking is enabled (valid only in the GUI). A component name may be substituted for NODE.
Surface of a p-element shell structure where the convergence checking for NODE will be performed. Valid only for Item = S or EPEL.
TOP | — | Top surface (default). |
MID | — | Middle surface. |
BOT | — | Bottom surface. |
When you use the menu paths to delete p-method convergence criteria, the ANSYS program writes the command PCONV,DELE,n to its log file.
The p-level (polynomial level, i.e., the order or level n of a polynomial, where 2 
n 8) is increased
for each loop until the values of the specified items (Item,Comp)
change less than the specified tolerance (TOLER)
between loops, or until the maximum p-level has been reached [PPRANGE].
Convergence checking is performed only on included elements [PINCLUDE].
Up to 10 separate specifications may be activated at one time. Valid Item and Comp labels
are shown next.
PCONV - Valid Item and Component Labels
| Item | Comp | Description |
|---|---|---|
| SE | Strain energy or stored electrostatic energy | |
| S | X, Y, Z, XY, YZ, XZ | Component stress |
| " | 1, 2, 3 | Principal stress |
| " | INT | Stress intensity |
| " | EQV | Equivalent stress |
| EPEL | X, Y, Z, XY, YZ, XZ | Component elastic strain |
| " | 1, 2, 3 | Principal elastic strain |
| " | INT | Elastic strain intensity |
| " | EQV | Elastic equivalent strain |
| U | X, Y, Z, SUM | X, Y, or Z structural displacement or vector sum |
| ROT | X, Y, Z, SUM | X, Y, or Z structural rotation or vector sum (valid only for SHELL150) |
| VOLT | Electric potential | |
| EF | X, Y, Z, SUM | Electric field strength |
| D | X, Y, Z, SUM | Electric flux density |
| EFORC | X, Y, Z, SUM | Global electrostatic (Maxwell Stress Tensor) force |
This command is also valid in PREP7.
Distributed ANSYS Restriction. This command is not supported in Distributed ANSYS.