AWAVE

AWAVE, Wavenum, Wavetype, Opt1, Opt2, VAL1, VAL2, VAL3, VAL4, VAL5, VAL6, VAL7, VAL8, VAL9, VAL10, VAL11, VAL12, VAL13, KCN
Specifies input data for an acoustic incident wave.

SOLUTION: Misc Loads

Wavenum

Wave number. You specify the integer number for an acoustic incident wave inside or outside the model. The number must be between 1 and 20.

Wavetype

Wave type:

PLAN	—	Planar incident wave
MONO	—	Monopole or pulsating sphere incident wave
DIPO	—	Dipole incident wave
BACK	—	Back enclosed loudspeaker
BARE	—	Bare loudspeaker
STATUS	—	Displays the status of the acoustic wave settings if `Wavenum` = a number between 1 and 20 or ALL.
DELE	—	Deletes the acoustic wave settings if `Wavenum` = a number between 1 and 20 or ALL.

Opt1

PRES	—	Pressure (not valid for `Wavetype` = BACK)
VELO	—	Velocity

Opt2

EXT	—	Incident wave outside the model.
INT	—	Incident wave inside the model. This option is only available for pure scattered pressure formulation.

For Wavetype = PLAN, only Opt2 = EXT is available.

VAL1, VAL2, VAL3, . . . , VAL13

If Wavetype = PLAN, MONO, DIPO, BACK, or BARE:

*`VAL1`*	—	Amplitude of pressure or normal velocity to the sphere surface.
*`VAL2`*	—	Phase angle of the applied pressure or velocity (in degrees). Defaults to 0 degrees.

If Wavetype = PLAN:

*`VAL3`*	—	Incident ϕ angle from x axis toward y axis.
*`VAL4`*	—	Incident θ angle from z axis toward y axis.
*`VAL5`*	—	Not used.

If Wavetype = MONO, DIPO, BACK, or BARE:

VAL3 - VAL5

—

Global Cartesian coordinate values of source position.

If Wavetype = PLAN, MONO, DIPO, BACK, or BARE:

*`VAL6`*	—	Mass density of base medium (defaults to 1.2041 kg/m3).
*`VAL7`*	—	Speed of sound in base medium (defaults to 343.24 m/s).
*`VAL8`*	—	Radius of pulsating sphere (not used for `Wavetype` = PLAN).
*`VAL9`*	—	Dipole length (only available for `Wavetype` = DIPO, BARE).
*`VAL10 - VAL12`*	—	Unit vector of dipole axis from the positive to the negative. Only available for `Wavetype` = DIPO, BARE.
*`VAL13`*	—	Port number if the incident power is required on the port

KCN

A predefined local (KCN >10) or global (KCN = 0) Cartesian coordinate system number used to specify the direction of normal velocity for Wavetype = BACK. Defaults to the global Cartesian coordinate system (KCN = 0). The local Z-direction must be the direction of normal velocity.

Notes

Use the ASOL command to activate the scattered field algorithm and the ASCRES command for output control with the scattered field algorithm. Refer to Acoustics in the Theory Reference for more information about pure scattered field formulation.

Menu Paths

This command cannot be accessed from a menu.