Mechanical APDL Basic Analysis Guide - Ansys

! Load Step 1:
D, ... ! Loads
SF, ...
...
NSUBST, ... ! Load step options
KBC, ...
OUTRES, ...
OUTPR, ...
...
LSWRITE ! Writes load step file: Jobname.S01
! Load Step 2:
D, ... ! Loads
SF, ...
...
NSUBST, ... ! Load step options
KBC, ...
OUTRES, ...
OUTPR, ...
...
LSWRITE ! Writes load step file: Jobname.S02
0
See the Command Reference for descriptions of the NSUBST, KBC, OUTRES, OUTPR, and LSWRITE commands.
Some notes about the load step file:
• The load step data are written to the file in terms of ANSYS commands.
• The LSWRITE command does not capture changes to real constants (R), material properties (MP),
couplings (CP), or constraint equations (CE).
• The LSWRITE command automatically transfers solid-model loads to the finite element model, so all
loads are written in the form of finite-element load commands. In particular, surface loads are always
written in terms of SFE (or SFBEAM) commands, regardless of how they were applied.
• To modify data on load step file number n, issue the command LSREAD,n to read in the file, make the
desired changes, and then issue LSWRITE,n (which will overwrite the old file n). You can also directly
edit the load step file using your system editor, but this is generally not recommended. The GUI equivalents
of the LSREAD command are:
Command(s): LSREAD
GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Read LS File
Main Menu> Solution> Load Step Opts> Read LS File
• The LSDELE command allows you to delete load step files from within the ANSYS program. The GUI
equivalents of LSDELE are:
Command(s): LSDELE
GUI: Main Menu> Preprocessor> Loads> Define Loads> Operate> Delete LS Files
Main Menu> Solution> Define Loads> Operate> Delete LS Files
• Another useful load step related command is LSCLEAR, which allows you to delete all loads and reset
all load step options to their defaults. You can use it, for example, to "clean up" the load step data before
reading in a load step file for modifications.
GUI equivalents for LSCLEAR are:
Command(s): LSCLEAR
GUI: Main Menu> Preprocessor> Loads> Define Loads> Delete> All Load Data> data type
Main Menu> Preprocessor> Loads> Reset Options
Main Menu> Preprocessor> Loads> Define Loads> Settings> Replace vs Add
Main Menu> Solution> Reset Options
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
2.7. Creating Multiple Load Step Files
63