Control Volumes

Control volume entities define and store control volumes typically used in safety analysis.

Control volumes do not have a display state.

LS-DYNA Cards

Use the Control Volume panel to control volume objects within a model. The *AIRBAG_OPTION card is output from this panel. The POP option is supported for WANG_NEFSKE options.
Card Description
*AIRBAG_ADIABATIC_GAS_MODEL_ID Define an airbag or control volume
*AIRBAG_ADVANCED_ALE *DEFINE_ALEBAG_BAG, *DEFINE_ALEBAG_HOLE, and *DEFINE_ALEBAG_INFLATOR to define ALE type AIRBAG in modular way.
*AIRBAG_ALE Provides a simplified approach to defining the deployment of the airbag using the ALE capabilities with an option to switch from the initial ALE method to control volume method at a chosen time.
*AIRBAG_HYBRID_CHEMKIN_ID Define an airbag or control volume
*AIRBAG_HYBRID_ID Define an airbag or control volume
*AIRBAG_HYBRID_JETTING_ID
*AIRBAG_HYBRID_JETTING_CM_ID
*AIRBAG_INTERACTION_ID Define two connected airbags which vent into each other
*AIRBAG_LINEAR_FLUID_ID
*AIRBAG_LOAD_CURVE_ID
*AIRBAG_PARTICLE To define an airbag using the particle method.
*AIRBAG_REFERENCE_GEOMETRY_BIRTH If the reference configuration of the airbag is taken as the folded configuration, the geometrical accuracy of the deployed bag will be affected by both the stretching and the compression of elements during the folding process.
*AIRBAG_REFERENCE_GEOMETRY_BIRTH_RDT
*AIRBAG_REFERENCE_GEOMETRY_RDT
*AIRBAG_SHELL_REFERENCE_GEOMETRY
*AIRBAG_SIMPLE_AIRBAG_MODEL_ID
*AIRBAG_SIMPLE_PRESSURE_VOLUME_ID
*AIRBAG_WANG_NEFSKE_ID
*AIRBAG_WANG_NEFSKE_JETTING_ID
*AIRBAG_WANG_NEFSKE_JETTING_CM
*AIRBAG_WANG_NEFSKE_JETTING_POP_ID
*AIRBAG_WANG_NEFSKE_JETTING_POP_CM
*AIRBAG_WANG_NEFSKE_MULTIPLE_JETTING_CM_ID
*AIRBAG_WANG_NEFSKE_MULTIPLE_JETTING_ID
*AIRBAG_WANG_NEFSKE_MULTIPLE_JETTING_POP_CM_ID
*AIRBAG_WANG_NEFSKE_MULTIPLE_JETTING_POP_ID
*AIRBAG_WANG_NEFSKE_POP_ID
*DEFINE_ALEBAG_BAG Defines the surface that constitutes the airbag's outer surface for ALE airbag.
*DEFINE_ALEBAG_HOLE Defines the surface that constitutes the vents for ALE airbag.
*DEFINE_ALEBAG_INFLATOR Defines the inflator for ALE airbag.
*DEFINE_CPM_BAG_INTERACTION Allows interaction between two particle bags.
*DEFINE_CPM_CHAMBER Defines airbag chambers for air particle initialization or chamber interaction.
*DEFINE_CPM_GAS_PROPERTIES Defines extended gas thermodynamic properties.
*DEFINE_CPM_VENT Defines extended vent hole options.
*INITIAL_FOAM_REFERENCE_GEOMETRY The reference configuration allows stresses to be initialized in the following hyperelastic material models: 2, 7, 21, 23, 27, 31, 38, 57, 73, 83, 132 and 181.

PAM-CRASH Cards

Card Description
BAGIN Airbag definition
CHAMBER Multiple chamber definitions
END_BAGIN Terminates the whole general airbag definition
END_CHAMBER Ends each chamber description
EXT_SKIN Chamber outer skin elements
Note: Sub-keyword of CHAMBER
FPM FPM definition card
Note: Sub-keyword of BAGIN
FPM_HOLE Hole for SPHCEL
Note: Sub-keyword of CHAMBER
GAS Chamber GAS definition
Note: Sub-keyword of BAGIN

Sub-keyword of CHAMBER

GEN_INI_COND Chamber gas initial condition
Note: Sub-keyword of BAGIN
INFLATOR Airbag inflator definition
Note: Sub-keyword of CHAMBER
INI_COND Initial condition of gas
Note: Sub-keyword of CHAMBER
JET Jet definition
Note: Sub-keyword of CHAMBER
LEAKAGE Vents and holes definition in airbag
Note: Sub-keyword of CHAMBER
LOCAL_H FPM - Local smoothing length card
Note: Sub-keyword of BAGIN
WALL_FABRIC Define chamber wall fabric
Note: Sub-keyword of CHAMBER
WALL_OPENING Chamber wall opening
Note: Sub-keyword of CHAMBER

Radioss Cards

Card Description
/MONVOL Describes the monitored volume types.
Note: Block Format Keyword
/MONVOL/AIRBAG1 Describes one-chambered airbag with hybrid input of injected gas. This keyword is similar to /MONVOL/AIRBAG (Obsolete), but has more flexible input.
Note: Block Format Keyword
/MONVOL/AREA Describes the monitored volume type AREA.
Note: Block Format Keyword
/MONVOL/COMMU1 Describes multi-chambered airbag with hybrid input of injected gas. This keyword is similar to obsolete keyword /MONVOL/COMMU, but has more flexible input.
Note: Block Format Keyword
/MONVOL/FVMBAG1 Describes Finite Volume Method Airbag, which has more flexible input than the similar obsolete keyword /MONVOL/FVMBAG.
Note: Block Format Keyword
/MONVOL/GAS Describes the perfect gas monitored volume type.
Note: Block Format Keyword
/MONVOL/PRES Describes the pressure load curve monitored volume type.
Note: Block Format Keyword
/REFSTA Describes the reference state for elements belonging to a part, using given nodal coordinates.
Note: Block Format Keyword

You need to create a new include file, set the include file type as REFSTA and create this card in the include file.