2.2. Commands Used in an Acoustic Analysis

The following commands are commonly used in an acoustic analysis:

Table 2.2: Primary Acoustic Analysis Commands

Command Comments
APORT Specifies parameters for the plane wave and acoustic duct port.
ASIFILE Defines writing or reading the one-way acoustic-structural coupling data to or from a file.
ASOL Specify an acoustic harmonic analysis with the scattered pressure formulation.
ASCRES Output control for an acoustic scattering analysis.
AWAVE Defines the analytic acoustic incident wave source.
DFSWAVE Specifies the incident planar waves with random phases for a diffuse sound field.
ECPCHG Optimizes degree-of-freedom usage in a coupled acoustic model.
FLUREAD Reads one-way Fluent-to-Mechanical APDL coupling data via a .cgns file with one-side fast Fourier transformation complex pressure peak value.
HFANG Defines spatial angles of a spherical radiation surface for an acoustic radiator.
HFSYM Indicates the presence of symmetry planes for the computation of an acoustic field in the near- or far-field domains (beyond the finite element region).
MRPMDefines the frequency of machine rotation in revolutions per minute.
MSOLVE Starts multiple solutions for random acoustics analysis with diffuse sound field.
PLASPlots a specified acoustic quantity on the selected exterior surface, energy on the selected elements, or the frequency-band sound pressure level (SPL) on the nodes over a frequency range.
PLFAR Plots acoustic far-field parameters.
PLNEAR Plots the acoustic parameters in the near zone exterior to the equivalent source surface.
PMLOPT Defines perfectly matched layers (PML) or irregular perfectly matched layers (IPML).
PMLSIZE Determines the number of PML or IPML layers.
PRAS Prints a specified acoustic quantity on the selected exterior surface, energy on the selected elements, or the frequency-band sound pressure level (SPL) on the nodes over a frequency range.
PRFAR Prints acoustic far-field parameters.
PRNEAR Prints the acoustic parameters in the near zone exterior to the equivalent source surface.
PSYS Sets the PML element coordinate system attribute pointer.

Table 2.3: Secondary Acoustic Analysis Commands

Command Comments
ANTYPE Sets a flag indicating whether a subsequent linear perturbation will be performed.
BF Defines the acoustic body loads.
CP Couples nodes for the Floquet periodic boundary condition.
CPCYC Couples nodes for the Floquet periodic boundary condition (cyclic symmetry).
*GETObtains acoustic parameters in post-processing.
HARFRQ Defines the frequency range in the harmonic analysis, including the octave bands.
LDREADReads mean flow results from the results file and applies them as loads.
MORPH Specify the morphing operation in an acoustic linear perturbation.
NSOL Prints the solution results for nodes.
PLESOL Plots the acoustic solution results for elements.
PRESOL Prints the acoustic solution results for elements.
PLNSOL Plots the acoustic solution results for nodes.
PRNSOL Prints the acoustic solution results for nodes.
SF Defines the acoustic surface loads and flags.
TBDefines the acoustic frequency-dependent materials, the equivalent model of perforated materials, and the viscous-thermal model.
/UNITSAnnotates the database with the system of units used for acoustic default values.