12.1. Helpful Postprocessing Commands

The following commands are helpful in postprocessing acoustic analysis results:

Table 12.1: Postprocessing Commands

Task Command
Select the real solution.SET,1,1,,0
Select the imaginary solution.SET,1,1,,1
Select the amplitude.SET,1,1,,AMPL
Print output quantities: pressure, SPL, dBA, energy density (room acoustics), temperature (viscous-thermal acoustics), and velocity (viscous-thermal acoustics) at corner nodes. [1][2]PRNSOL,Item (Item = PRES, SPL, SPLA, ENKE, TEMP, or V)
Print velocity, sound intensity, or energy density flux (room acoustics) at corner nodes. [1][2]PRVECT,PG or SNDI
Create an element table item for the X, Y, or Z component of centroid velocity. [3] ETABLE,Lab,PG,X (or Y, or Z)
Print the specified element table items.PRETAB

  1. Average of selected elements adjacent to nodes

  2. RMS value: measurable values are the sum of real and imaginary parts.

  3. Instantaneous value (real/imaginary, at ωt = 0 and ωt = -90) in the case of a harmonic analysis.

For more information about notation, see the Mechanical APDL Theory Reference.

To view less frequently used items, issue the ETABLE command.

Most output items can be viewed (plotted) graphically. To do so, substitute the appropriate plot command (PL xxxxx) for the corresponding print command (PR xxxxxx), as shown in this table:

Table 12.2: Plotting Commands

For this print command... Substitute this plot command:
PRNSOL PLNSOL
PRVECT PLVECT
PRESOL PLESOL
PRETAB PLETAB

Element table items can also be plotted. For more information, see Creating an Element Table in the Basic Analysis Guide.

The Ansys Parametric Design Language (APDL) also contains commands that may be useful in postprocessing and results processing. For more information, see the Ansys Parametric Design Language Guide.