antype#
- Mapdl.antype(antype='', status='', ldstep='', substep='', action='', **kwargs)#
Specifies the analysis type and restart status.
APDL Command: ANTYPE
- Parameters:
- antype
Analysis type (defaults to the previously specified analysis type, or to
STATIC
if none specified):- STATIC or 0
Perform a static analysis. Valid for all degrees of freedom.
- BUCKLE or 1
Perform a buckling analysis. Implies that a previous static solution was performed with prestress effects calculated (
Mapdl.pstres('ON')
). Valid for structural degrees of freedom only.- MODAL or 2
Perform a modal analysis. Valid for structural and fluid degrees of freedom.
- HARMIC or 3
Perform a harmonic analysis. Valid for structural, fluid, magnetic, and electrical degrees of freedom.
- TRANS or 4
Perform a transient analysis. Valid for all degrees of freedom.
- SUBSTR or 7
Perform a substructure analysis. Valid for all degrees of freedom.
- SPECTR or 8
Perform a spectrum analysis. Implies that a previous modal analysis was performed. Valid for structural degrees of freedom only.
- status
Specifies the status of the analysis (new or restart):
- NEW
Specifies a new analysis (default). If
NEW
, the remaining fields on this command are ignored.- RESTART
Specifies a restart of a previous analysis. Valid for static, modal, and transient (full or mode-superposition method) analyses. For more information about restarting static and transient analyses, see Multiframe Restart in the Basic Analysis Guide. For more information on restarting a modal analysis, see Modal Analysis Restart in the Basic Analysis Guide.
Multiframe restart is also valid for harmonic analysis, but is limited to 2-D magnetic analysis only.
A substructure analysis (backsubstitution method only) can be restarted for the purpose of generating additional load vectors. For more information, see the
Mapdl.seopt()
command and Applying Loads and Creating the Superelement Matrices in the Substructuring Analysis Guide.- VTREST
Specifies the restart of a previous VT Accelerator analysis. Valid only with
Antype = STATIC
,HARMIC
, orTRANS
. For more information, see VT Accelerator Re-run in the Basic Analysis Guide.
- ldstep
Specifies the load step at which a multiframe restart begins.
- substep
Specifies the substep at which a multiframe restart begins.
- action
Specifies the manner of a multiframe restart.
- CONTINUE
The program continues the analysis based on the specified
LDSTEP
andSUBSTEP
(default). The current load step is continued. If the end of the load step is encountered in the.Rnnn
file, a new load step is started. The program deletes all.Rnnn
files, or.Mnnn
files for mode-superposition transient analyses, beyond the point of restart and updates the.LDHI
file if a new load step is encountered.- ENDSTEP
At restart, force the specified load step (
LDSTEP
) to end at the specified substep (SUBSTEP
), even though the end of the current load step has not been reached. At the end of the specified substep, all loadings are scaled to the level of the current ending and stored in the.LDHI
file. A run following thisENDSTEP
starts a new load step. This capability allows you to change the load level in the middle of a load step. The program updates the.LDHI
file and deletes all .Rnnn files, or.Mnnn
files for mode- superposition transient analyses, beyond the point ofENDSTEP
. The.Rnnn
or.Mnnn
file at the point ofENDSTEP
are rewritten to record the rescaled load level.- RSTCREATE
At restart, retrieve information to be written to the results file for the specified load step (
LDSTEP
) and substep (SUBSTEP
). Be sure to useMapdl.outres()
to write the results to the results file. This action does not affect the.LDHI
or.Rnnn
files. Previous items stored in the results file at and beyond the point ofRSTCREATE
are deleted. This option cannot be used to restart a mode-superposition transient analysis.- PERTURB
At restart, a linear perturbation analysis (static, modal, buckling, or full harmonic) is performed for the specified load step (
LDSTEP
) and substep (SUBSTEP
). This action does not affect the.LDHI
,.Rnnn
, or.RST
files.
Notes
If using the
Mapdl.antype()
command to change the analysis type in the sameMapdl.solve()
session, the program issues the following message: “Some analysis options have been reset to their defaults. Please verify current settings or respecify as required.” Typically, the program resets commands such asMapdl.nlgeom()
andMapdl.eqslv()
to their default values.The analysis type (
Mapdl.antype()
) cannot be changed if a restart is specified. Always save parameters before doing a restart. For more information on the different types of restart, see Restarting an Analysis in the Basic Analysis Guide.This command is also valid in
Mapdl.prep7()
.The ANSYS Professional - Nonlinear Structural (PRN) product supports the
Antype = TRANS
option for mode-superposition (Mapdl.trnopt("MSUP")
) analyses only.