Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys
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Chapter 2: Loading<br />
2.6.1.6. Other General Options<br />
You can also specify the following general options:<br />
• The reference temperature for thermal strain calculations, which defaults to zero degrees. Specify this<br />
temperature as follows:<br />
Command(s): TREF<br />
GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Other> Reference Temp<br />
Main Menu> Preprocessor> Loads> Define Loads> Settings> Reference Temp<br />
Main Menu> Solution> Load Step Opts> Other> Reference Temp<br />
Main Menu> Solution> Define Loads> Settings> Reference Temp<br />
• Whether a new factorized matrix is required for each solution (that is, each equilibrium iteration). You<br />
can do this only in a static (steady-state) or transient analysis, using one of these methods:<br />
Command(s): KUSE<br />
GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Other> Reuse LN22 Matrix<br />
Main Menu> Solution> Load Step Opts> Other> Reuse LN22 Matrix<br />
By default, the program decides whether a new matrix is required, based on such things as changes in<br />
DOF constraints, temperature-dependent material properties, and the Newton-Raphson option. If KUSE<br />
is set to 1, the program reuses the previous factorized matrix. This setting cannot be used during a<br />
multiframe restart. The command KUSE,-1 forces the factorized matrix to be reformulated at every<br />
equilibrium iteration. Analyses rarely require this; you will use it mainly for debugging purposes.<br />
To generate and keep the Jobname.LN22 file, issue the command EQSLV,SPARSE,,,,KEEP command.<br />
• A mode number (the number of harmonic waves around the circumference) and whether the harmonic<br />
component is symmetric or antisymmetric about the global X axis. When you use axisymmetric harmonic<br />
elements (axisymmetric elements with nonaxisymmetric loading), the loads are specified as a series of<br />
harmonic components (a Fourier series). To specify the mode number, use one of the following:<br />
Command(s): MODE<br />
GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Other> For Harmonic Ele<br />
Main Menu> Solution> Load Step Opts> Other> For Harmonic Ele<br />
See the Element Reference for a description of harmonic elements.<br />
• The type of scalar magnetic potential formulation to be used in a 3-D magnetic field analysis, specified<br />
via one of the following:<br />
Command(s): MAGOPT<br />
GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Magnetics> potential formulation<br />
method<br />
Main Menu> Solution> Load Step Opts> Magnetics> potential formulation method<br />
• The type of solution to be expanded in the expansion pass of a reduced analysis, specified via one of<br />
the following:<br />
58<br />
Command(s): NUMEXP, EXPSOL<br />
GUI: Main Menu> Preprocessor> Loads> Load Step Opts> ExpansionPass> Single Expand><br />
Range of Solu's<br />
Main Menu> Solution> Load Step Opts> ExpansionPass> Single Expand> Range of Solu's<br />
Main Menu> Preprocessor> Loads> Load Step Opts> ExpansionPass> Single Expand> By Load<br />
Step<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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