ABAQUS Volume II: I–Z - Manual (Page 583)

*UNDEX CHARGE PROPERTY
20.2 *UNDEX CHARGE PROPERTY: Define an UNDEX charge for incident waves.
This option defines parameters that create the time histories of load, displacement, and other variables used
to simulate an underwater explosion. This option must be used in conjunction with the *INCIDENT WAVE
INTERACTION PROPERTY option.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model or history data
Level: Model, Step
References:
•
“Acoustic loads,” Section 27.4.5 of the ABAQUS Analysis User’s Manual
•
*INCIDENT WAVE INTERACTION PROPERTY
There are no parameters associated with this option.
Data lines to define the UNDEX charge:
First line:
1. Charge material constant, K.
2. Charge material constant, k.
3. Charge material constant, A.
4. Charge material constant, B.
5. Adiabatic charge constant, .
6. Ratio of specific heats for gas, .
Second line:
1. Density of charge material, .
2. Mass of charge material, .
3. Acceleration due to gravity, g.
4. Atmospheric pressure, .
5. Wave effect parameter, . Set to 1.0 for wave effects in the fluid and gas; set to 0.0 to neglect
these effects.
6. Flow drag coefficient, .
Third line:
1. Time duration, .
20.2–1
ABAQUS Version 6.1 Module: ID:
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