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 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)

Comments

  1. The source strength is calculated as:
    S = A 1 2πf 2 8πCP f ρ e i θ+2πfτ MathType@MTEF@5@5@+= feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbwvMCKfMBHbqee0evGueE0jxy aibaieYlf9irVeeu0dXdh9vqqj=hEeeu0xXdbba9frFj0=OqFfea0d Xdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXdbPYxe9vr0=vr0=vq pWqaaeaabiGaciaacaqabeaabiWacqaaaOqaaabaaaaaaaaapeGaam 4uaiaaykW7cqGH9aqpcaaMc8Uaamyqa8aadaqadaqaa8qadaWcaaqa aiaaigdaaeaadaqadaqaaiaaikdacqaHapaCcaWGMbaacaGLOaGaay zkaaWaaWbaaSqabeaacaaIYaaaaaaakmaakaaabaWaaSaaaeaacaaI 4aGaeqiWdaNaam4qaiaadcfapaWaaeWaaeaapeGaamOzaaWdaiaawI cacaGLPaaaa8qabaGaeqyWdihaaaWcbeaaaOWdaiaawIcacaGLPaaa peGaamyzamaaCaaaleqabaGaamyAa8aadaqadaqaa8qacqaH4oqCcq GHRaWkcaaIYaGaeqiWdaNaamOzaiabes8a0bWdaiaawIcacaGLPaaa aaaaaa@5721@
    where, C = B ρ
  2. Dynamic load sets must be selected in the I/O Options or Subcase Information sections with the command DLOAD = SID.
  3. SID must be unique with respect to other dynamic load sets, ACSRCE, DLOAD, RLOAD1, RLOAD2, TLOAD1, and TLOAD2 entries.
  4. The referenced EXCITEID, DELAY and DPHASE entries must specify fluid points only.
  5. If either DELAY or DPHASE are blank or zero, the corresponding τ or θ will be zero.
  6. 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).