ACSRCE

Bulk Data Entry Defines acoustic source as a function of power vs. frequency.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
ACSRCE	`SID`	`EXCITEID`	`DELAY`	`DPHASE`	`TP`	`RHO`	`B`

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
ACSRCE	111	29	-0.2	87	14	1.0	15

Field	Contents	SI Unit Example
`SID`	Dynamic load set identification number. No default (Integer > 0)
`EXCITEID`	Identification number of an SLOAD entry set that defines $A$ . No default (Integer > 0)
`DELAY`	Defines time delay $τ$ . If it is a non-zero integer, it represents the identification number of a DELAY Bulk Data Entry that defines $τ$ . If it is real, it directly defines the value of $τ$ that will be used for all degrees-of-freedom that are excited by this dynamic load entry. Default = 0 (Integer > 0, or Real)
`DPHASE`	Defines phase $θ$ . If it is a non-zero integer, it represents the identification number of a DPHASE Bulk Data Entry that defines $θ$ . If it is real, it directly defines the value of $θ$ that will be used for all degrees-of-freedom that are excited by this dynamic load entry. Default = 0 (Integer > 0, or Real)
`TP`	Set identification number of the TABLED1, TABLED2, TABLED3, or TABLED4 entry that gives $P (f)$ . Default = 0 (Integer > 0)
`RHO`	Fluid density. No default (Real > 0.0)
`B`	Bulk modulus of fluid. No default (Real > 0.0)

The source strength is calculated as:(1)
$S = A (\frac{1}{2 π f} \sqrt{\frac{8 π C P (f)}{ρ}}) e^{i (θ + 2 π f τ)}$
where, $C = \sqrt{\frac{B}{ρ}}$
Dynamic load sets must be selected in the I/O Options or Subcase Information Sections with the command DLOAD = SID.
SID must be unique with respect to other dynamic load sets, ACSRCE, DLOAD, RLOAD1, RLOAD2, TLOAD1, and TLOAD2 entries.
The referenced EXCITEID, DELAY and DPHASE entries must specify fluid points only.
If either DELAY or DPHASE are blank or zero, the corresponding $τ$ or $θ$ will be zero.
A (defined in EXCITEID) is a dimensionless quantity and the units of $P (f)$ (defined in TP) is of Power (kg*m2/s3, N*m/s, or J/s).