3D Connexion Version 6.6 manual

*IMPEDANCE PROPERTY
9.2 *IMPEDANCEPROPERTY: Define the impedance parameters for an acoustic medium
boundary.
This option is used to define the proportionalityfactors between the pressure and the normal components of
surfacedisplacement and velocity in acoustic analysis. The*IMPEDANCE PROPERTY option must be used
in conjunction with the *IMPEDANCE or *SIMPEDANCE option.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
•“Acoustic loads,” Section 27.4.5 of theAB AQUS Analysis User’sManual
•*IMPEDANCE
•*SIMPEDANCE
Required parameter:
NAME
Set this parameter equal to a label that will be used to refer to the impedance property on the
*IMPEDANCE or *SIMPEDANCE option.
Optional parameters:
DATA
Set DATA=ADMITTANCE(default) to specify an impedance using a table of admittance values.
Set DATA=IMPEDANCEto specify an impedance using a table of real and imaginary parts
of the impedance.
INPUT
Set this parameter equal to the name of the alternate input file containing the data lines for this
option. See “Input syntax rules,” Section 1.2.1 of the ABAQUS Analysis User’s Manual, for the
syntax of such file names. If this param eter is omitted, it is assumed that the data follow the keyword
line.
9.2–1
ABAQUS Version 6.1 Module: ID:
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