Mechanical APDL Structural Analysis Guide

• When setting TIME, remember that this load step option specifies time at the end of the load step. The
  default value is 1.0 for the first load step. For subsequent load steps, the default is 1.0 plus the time specified
  for the previous load step. Although time has no physical meaning in a static analysis (except in the case
  of creep, viscoplasticity, or other rate-dependent material behavior), it is used as a convenient way of re-
  ferring to load steps and substeps (see Loading in the Basic Analysis Guide).

2.2.2.3. The Transient Tab

The Transient tab contains transient analysis controls; it is available only if you choose a transient
analysis and remains grayed out when you choose a static analysis. For these reasons, it is not described
here.

2.2.2.4. Using the Sol'n Options Tab

You can use the Sol'n Options tab to set the options listed in Table 2.2: Sol'n Options Tab Options (p. 12).
For specific information about using the Solution Controls dialog box to set these options, access the
dialog box, select the Sol'n Options tab, and click the Help button.

Table 2.2: Sol'n Options Tab Options

For more information about this option, see the following

section(s) in the Basic Analysis Guide:

Option

Specify equation solver [EQSLV] • Selecting a Solver

Specify parameters for multiframe

restart [RESCONTROL]

• Multiframe Restart

Special considerations for setting these options in a static analysis include:

• When setting EQSLV, specify one of these solvers:
  
  
  • Program chosen solver (ANSYS selects a solver for you, based on the physics of the problem)
  
  
  • Sparse direct solver (default for linear and nonlinear, static and full transient analyses)
  
  
  • Preconditioned Conjugate Gradient (PCG) solver (recommended for large size models, bulky structures)
  
  
  • Iterative solver (auto-select; for linear static/full transient structural or steady-state thermal analyses
    only; recommended)
  
  
  
  

2.2.2.5. Using the Nonlinear Tab

You can use the Nonlinear tab to set the options listed in Table 2.3: Nonlinear Tab Options (p. 12). For
specific information about using the Solution Controls dialog box to set these options, access the dialog
box, select the Nonlinear tab, and click the Help button.

Table 2.3: Nonlinear Tab Options

For more information about this option, see the following

section(s) in the Structural Analysis Guide:

Option

Activate line search [LNSRCH] • Line Search Option (p. 247)

• Line Search (p. 270)

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Structural Static Analysis