Mechanical APDL Structural Analysis Guide

Command(s):NSOL (primary data, that is, nodal displacements) ESOL (derived data, that is, element

solution data, such as stresses) RFORCE (reaction force data) FORCE (total force, or static, damping,

or inertia component of total force) SOLU (time step size, number of equilibrium iterations, response

frequency, and so on)

GUI: Main Menu> TimeHist Postpro> Define Variables

Note

In the mode-superposition method, only static force is available with the FORCE

command.

2. Graph or list the variables. By reviewing the time-history results at strat egic points throughout the
   model, you can identify the critical time points for further POST1 postprocessing.
   Command(s): PLVAR (graph variables) PRVAR,EXTREM (list variables)
   GUI: Main Menu> TimeHist Postpro> Graph Variables
   Main Menu> TimeHist Postpro> List Variables
   Main Menu> TimeHist Postpro> List Extremes

5.3.10.4. Other Capabilities

Many other postprocessing functions, such as performing math operations among variables, moving
variables into arra y parameters, and moving arra y parameters into variables, are available in POST26.
See The Time-History Postprocessor (POST26) in the Basic Analysis Guide for details.

5.3.10.5. Using POST1.

1. Read in model data from the database file.
   Command(s):RESUME
   GUI: Utility Menu> File> Resume from


2. Read in the desired set of results. Use the SET command to identify the data set by load step and substep
   numbers or by time.
   Command(s):SET
   GUI: Main Menu> General Postproc> Read Results> By Time/Freq


3. Perform the necessary POST1 operations. The typical POST1 operations that you perform for a transient
   dynamic analysis are the same as those that you perform for a static analysis. See Typical Postprocessing
   Operations (p. 20) for a list of these operations.

Note

If you specify a time for which no results are available, the results that are stored will be

a linear interpolation between the two nearest time points.

5.3.11. Sample Input for a Full Transient Dynamic Analysis

A sample input listing for a full transient analysis is shown below:

! Build the Model

/FILNAM,...! Jobname

/TITLE,...! Title

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Performing a Full Transient Dynamic Analysis