Mechanical APDL Structural Analysis Guide

GUI: Main Menu> TimeHist Postpro> Define Variables

Note

The NSOL command is for primary data (nodal displacements), the ESOL command

for derived data (element solution data, such as stresses), and the RFORCE command

for reaction force data. To specify the total force, static component of the total force,

damping component, or the inertia component, use the FORCE command.

2. Graph the variables (versus frequency or any other variable). Then use PLCPLX to work with just
   the amplitude, phase angle, real part, or imaginary part.
   Command(s):PLVAR,PLCPLX
   GUI: Main Menu> TimeHist Postpro> Graph Variables
   Main Menu> TimeHist Postpro> Settings> Graph


3. Get a listing of the variable. To list just the extreme values, use the EXTREM command. Then use
   the PRCPLX command to work with amplitude and phase angle or real and imaginary part.
   Command(s):PRVAR,EXTREM,PRCPLX
   GUI: Main Menu> TimeHist Postpro> List Variables> List Extremes
   Main Menu> TimeHist Postpro> List Extremes
   Main Menu> TimeHist Postpro> Settings> List

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

By reviewing the time-history results at strat egic points throughout the model, you can identify the
critical frequencies for further POST1 postprocessing.

4.4.4.4. Using POST1.

1. You can use the SET command to read in the results for the desired harmonic solution. It can read in
   either the real component, the imaginary component, the amplitude, or the phase.


2. Display the deformed shape of the structure, contours of stresses, strains, etc., or vector plots of vector
   items (PLVECT). To obtain tabular listings of data, use PRNSOL,PRESOL,PRRSOL, etc.
   
   
   • Option: Display Deformed Shape
     Command(s):PLDISP
     GUI: Main Menu> General Postproc> Plot Results> Deformed Shape
   
   
   • Option: Contour Displays
     Command(s):PLNSOL or PLESOL
     GUI: Main Menu> General Postproc> Plot Results> Contour Plot> Nodal Solu or Element Solu
   
   
   
   

Use these options to contour almost any result item, such as stresses (SX, SY, SZ...), strains (EPELX,

EPELY, EPELZ...), and displacements (UX, UY, UZ...).

The KUND field on PLNSOL and PLESOL gives you the option of overlaying the undeformed shape

on the display.

• Option: Vector Plots
  Command(s):PLVECT

Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Performing a Harmonic Analysis