Mechanical APDL Basic Analysis Guide - Ansys

Chapter 5: Solution
If the files Jobname.LDHI and Jobname.RDB exist, the ANTYPE,,REST command will cause ANSYS to do
the following:
• Resume the database Jobname.RDB
• Rebuild the loading and boundary conditions from the Jobname.LDHI file
• Rebuild the ANSYS solution commands and status from the .Rnnn file, or from the .Mnnn file in the
case of a mode-superposition transient analysis.
At this point, you can enter other commands to overwrite input restored by the ANTYPE command.
Note
The loading and boundary conditions restored from the Jobname.LDHI are for the FE mesh.
The solid model loading and boundary conditions are not stored on the Jobname.LDHI.
After the job is restarted, the files are affected in the following ways:
• The .RDB file is unchanged.
• All information for load steps and substeps past the restart point is deleted from the .LDHI file. Information
for each new load step is then appended to the file.
• All of the .Rnnn or .Mnnn files that have load steps and substeps earlier than the restart point will be
kept unchanged. Those files containing load steps and substeps beyond the restart point will be deleted
before the restart solution begins in order to prevent file conflicts.
• For nonlinear static and full transient analyses, the results file .RST is updated according to the restart.
All results from load steps and substeps later than the restart point are deleted from the file to prevent
conflicts, and new information from the solution is appended to the end of the results file.
• For a mode-superposition transient analysis, the reduced displacements file .RDSP is updated according
to the restart. All results from load steps and substeps later than the restart point are deleted from the
file to prevent conflicts, and new information from the solution is appended to the end of the reduced
displacements file.
When a job is started from the beginning again (first substep, first load step), all of the restart files (.RDB,
.LDHI, and .Rnnnor .Mnnn) in the current directory for the current jobname will be deleted before the
new solution begins.
You can issue a ANTYPE,,REST,LDSTEP,SUBSTEP,RSTCREATE command to create a results file for a particular
load step and substep of an analysis. Use the ANTYPE command with the OUTRES command to write the
results. A RSTCREATE session will not update or delete any of the restart files, allowing you to use RSTCREATE
for any number of saved points in a session. The RSTCREATE option is not supported in mode-superposition
analysis.
The sample input listing below shows how to create a results file for a particular substep in an analysis.
! Restart run:
/solu
antype,,rest,1,3,rstcreate !Create a results file from load
!step 1, substep 3
outres,all,all !Store everything into the results file
outpr,all,all !Optional for printed output
solve !Execute the results file creation
finish
/post1
set,,1,3 !Get results from load step 1,
!substep 3
122
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.