aport#
- Mapdl.aport(portnum='', label='', kcn='', pres='', phase='', val1='', val2='', val3='', val4='', **kwargs)#
Specifies input data for plane wave and acoustic duct ports.
APDL Command: APORT
- Parameters:
- portnum
Port number. This number is associated with an exterior port or interior port previously specified by the SF and BF family of commands, respectively. The number must be between 1 and 50.
- Label
"PLAN"
: Incident plane wave."RECT"
: Rectangular duct."CIRC"
: Circular duct."COAX"
: Coaxial duct."LIST"
: List the port settings. If PortNum = ALL, list the port settings for all defined ports."DELE"
: Delete defined ports. If PortNum = ALL, delete all defined ports.
- kcn
A previously-defined local (KCN >10) or global (KCN = 0) Cartesian coordinate system number used to specify the geometric properties of the duct. Defaults to the global Cartesian coordinate system (0). The local Z-direction must be the direction of wave propagation. The origin of the local coordinate system must be centered about the face of the duct port without considering symmetry.
- pres
Zero-to-peak amplitude of the pressure. If blank, the port will appear as a matching impedance.
- phase
Phase angle of the applied pressure in degrees. Defaults to 0.
- VAL1, VAL2, VAL3, VAL4
Additional input. The meaning of VAL1 through VAL4 varies depending on the specified Label. If
label="PLAN"
:"VAL1"
: angle from positive X-axis to positive Y-axis in the local Cartesian coordinates (KCN)."VAL2"
: angle away from positive Z-axis in the local Cartesian coordinates (KCN).
if
label="RECT"
:"VAL1"
: Width of the rectangular duct."VAL2"
: Height of the rectangular duct."VAL3"
: Mode index for pressure variation along the width (defaults to 0)."VAL4"
: Mode index for pressure variation along the height (defaults to 0).
if
label="CIRC"
:"VAL1"
: Radius of the circular duct."VAL2"
: Not used."VAL3"
: Mode index for pressure variation along the azimuth (defaults to 0)."VAL4"
: Mode index for pressure variation along the radii (defaults to 0).
if
label="COAX"
:"VAL1"
: Inner radius of the coaxial duct."VAL2"
: Outer radius of the coaxial duct."VAL3"
: Mode index for pressure variation along the azimuth (defaults to 0)."VAL4"
: Mode index for pressure variation along the radii (defaults to 0).
Notes
Use the APORT command to launch a specified analytic acoustic mode into a guided duct.
The low-order FLUID30 element does not support the higher modes in the coaxial duct
label="COAX"
.For more information, see Specified Mode Excitation in an Acoustic Duct in the Acoustic Analysis Guide, and Analytic Port Modes in a Duct in the Mechanical APDL Theory Reference.