Two-Way Radio User Manual

*
IMPEDANCE PROPERTY
9.2
*
IMPEDANCE PROPERTY: Define the impedance parameters for an acoustic medium
boundary.
This option is used to define the proportionality factors between the pressure and the normal components of
surface displacement 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 the ABAQUS Analysis User’s Manual
• *
IMPEDANCE
• *
SIMPEDANCE
Required parameter:
NAME
Set this param eter equal to a label that will be used to refer to the impedance property on the
*
IMPEDANCE or
*
SIMPEDANCE option.
Optional parameters:
DATA
Set D ATA =ADMITTANCE (default) to specify an impedance using a table of admittance values.
Set DATA=IMPEDANCE to 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 parameter 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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