Mechanical APDL Basic Analysis Guide

In some situations, you will need to explicitly request storage using the STORE command (Main Menu>
TimeHist Postpro> Store Data). These situations are explained below in the command descriptions.
If you use the STORE command after issuing the TIMERANGE command or NSTORE command (the
GUI equivalent for both commands is Main Menu> TimeHist Postpro> Settings> Data), then the default
is STORE,NEW. Otherwise, it is STORE,MERGE as listed in the command description below. This change
in command default is required since the TIMERANGE and NSTORE commands redefine time (or fre-
quency) points and time increment for data storage. You have the following options for storing data:

MERGE
Adds newly defined variables to previously stored variables for the time points stored in memory.
This is useful if you wish to store data using one specification (FORCE,SHELL,LAYERP26 commands)
and store data using another specification; see the example above.

NEW
Replaces previously stored variables, erases previously calculated variables, and stores newly defined
variables with current specifications.

APPEND
Appends data to previously stored variables. That is, if you think of each variable as a column of
data, the APPEND option adds rows to each column. This is useful when you want to "concatenate"
the same variable from two files, such as in a transient analysis with results on two separat e files.
Use the FILE command (Main Menu> TimeHist Postpro> Settings> File) to specify result file
names.

ALLOC,N
Allocates space for N points (N rows) for a subsequent storage operation. Pre viously stored variables,
if any, are zeroed. You normally do not need this option, because the program determines the
number of points required automatically from the results file.

Notes:

• By default, batch mode allows you to define up to ten variables. Use the NUMVAR command to in-
  crease the number of variables up to the available 200.


• Time or Frequency will always be variable 1


• By default, the force (or moment) values represent the total forces (sum of the static, damping, and
  inertial components). The FORCE command allows you to work with the individual components.

Note

The FORCE command only affects the output of element nodal forces.

• By default, results data for shell elements and layered elements are assumed to be at the top surface
  of the shell or layer. The SHELL command allows you to specify the top, middle or bottom surface.
  For layered elements, use the LAYERP26 and SHELL commands to indicat e layer number and surface
  location, respectively.


• Other commands useful when defining variables are:
  
  
  • NSTORE - defines the number of time points or frequency points to be stored.
  
  
  • TIMERANGE - defines the time or frequency range in which data are to be stored.
  
  
  
  

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Defining Variables