Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys
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Chapter 7:The General Postprocessor (POST1)<br />
was run). If you specify a time for which no results are available, the program performs linear interpolation<br />
to calculate results at that time.<br />
The default maximum number of substeps in the results file (Jobname.RST) is 1000. When the number of<br />
substeps exceeds this limit, you need to issue SET,Lstep,LAST to bring in the 1000th load step. Use<br />
/CONFIG to increase the limit.<br />
Caution<br />
For a nonlinear analysis, interpolation between time points usually degrades accuracy. Therefore,<br />
take care to postprocess at a time value for which a solution is available.<br />
Some convenience labels are also available on SET:<br />
• SET,FIRST reads in the first substep. The GUI equivalent is Main Menu> General Postproc> Read Results><br />
First Set.<br />
• SET,NEXT reads in the next substep. The GUI equivalent is Main Menu> General Postproc> Read<br />
Results> Next Set.<br />
• SET,LAST reads in the last substep. The GUI equivalent is Main Menu> General Postproc> Read Results><br />
Last Set.<br />
• The NSET field on the SET command (GUI equivalent is Main Menu> General Postproc> Read Results><br />
By Set Number) retrieves data that corresponds to its unique data set number, rather than its load step<br />
and substep number. This is extremely useful with FLOTRAN results, because you can have multiple<br />
sets of results data with identical load step and substep numbers. Therefore, you should retrieve FLOTRAN<br />
results data by its unique data set number. The LIST option on the SET command (or Main Menu><br />
General Postproc> List Results in the GUI) lists the data set number along with its corresponding load<br />
step and substep numbers. You can enter this data set number on the NSET field of the next SET<br />
command to request the proper set of results.<br />
• The ANGLE field on SET specifies the circumferential location for harmonic elements (structural -<br />
PLANE25, PLANE83, and SHELL61; thermal - PLANE75 and PLANE78).<br />
Note<br />
In ANSYS, you can postprocess results without reading in the results data if the solution results<br />
were saved to the database file (Jobname.DB). Distributed ANSYS, however, can only postprocess<br />
using the results file (Jobname.RST) and cannot use the Jobname.DB file since no solution<br />
results are written to the database. Therefore, you must issue a SET command before postprocessing<br />
in Distributed ANSYS.<br />
7.1.2. Other Options for Retrieving Results Data<br />
Other GUI paths or commands also enable you to retrieve results data.<br />
7.1.2.1. Defining Data to be Retrieved<br />
The INRES command (Main Menu> General Postproc> Data & File Opts) in POST1 is a companion to the<br />
OUTRES command in the PREP7 and SOLUTION processors. Where the OUTRES command controls data<br />
written to the database and the results file, the INRES command defines the type of data to be retrieved<br />
from the results file for placement into the database through commands such as SET, SUBSET, and APPEND.<br />
132<br />
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information<br />
of ANSYS, Inc. and its subsidiaries and affiliates.
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