# ACSRCE

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

## Format

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

## Example

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

## Definitions

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 $\tau$ . If it is a non-zero integer, it represents the identification number of a DELAY Bulk Data Entry that defines $\tau$ . If it is real, it directly defines the value of $\tau$ 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 $\theta$ . If it is a non-zero integer, it represents the identification number of a DPHASE Bulk Data Entry that defines $\theta$ . If it is real, it directly defines the value of $\theta$ 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 $P\left(f\right)$ .

Default = 0 (Integer > 0)

RHO Fluid density.

No default (Real > 0.0)

B Bulk modulus of fluid.

No default (Real > 0.0)

$S=A\left(\frac{1}{2\pi f}\sqrt{\frac{8\pi CP\left(f\right)}{\rho }}\right){e}^{i\left(\theta +2\pi f\tau \right)}$
where, $C=\sqrt{\frac{B}{\rho }}$
5. If either DELAY or DPHASE are blank or zero, the corresponding $\tau$ or $\theta$ will be zero.
6. A (defined in EXCITEID) is a dimensionless quantity and the units of $P\left(f\right)$ (defined in TP) is of Power (kg*m2/s3, N*m/s, or J/s).