BFA, Area, Lab, VAL1, VAL2, VAL3, VAL4
Defines a body force load on an area.
AreaArea to which body load applies. If ALL, apply to
all selected areas [ASEL]. A component name may
also be substituted for Area.
LabValid body load label. Load labels are listed under "Body Loads" in the input table for each element type in the Element Reference.
| Discipline | Body Load Label | Label Description |
|---|---|---|
| Structural | TEMP | temperature |
| FLUE | fluence | |
| Thermal | HGEN | heat generation rate |
| Magnetic | TEMP | temperature |
| JS | current densities | |
| Electric | TEMP | temperature |
| CHRGD | charge density | |
| Acoustic | JS | mass source or mass source rate |
| IMPD | impedance sheet | |
| TEMP | temperature |
VAL1, VAL2, VAL3Value associated with the Lab item or a table name for specifying
tabular boundary conditions. Use only VAL1 for TEMP, FLUE, HGEN,
CHRGD. For Lab = JS in magnetics, use
VAL1, VAL2, and
VAL3 for the X, Y, and Z components. For acoustics, if
Lab = JS, use VAL1 for mass source in a
harmonic analysis or mass source rate in a transient analysis, and ignore
VAL2 and VAL3. If
Lab = IMPD, VAL1 is the resistance and
VAL2 is the reactance in ohms/square. When specifying a table
name, you must enclose the table name in percent signs (%), e.g.,
BFA,Area,Lab,%tabname%. Use the *DIM command to define a
table.
VAL4If Lab = JS, VAL4 is the phase angle in degrees.
Defines a body force load (such as temperature in a structural analysis, heat generation rate in a thermal analysis, etc.) on an area. Body loads may be transferred from areas to area elements (or to nodes if area elements do not exist) with the BFTRAN or SBCTRAN commands. Body loads default to the value specified on the BFUNIF command, if it was previously specified.
You can specify a table name only when using temperature (TEMP) and heat generation rate (HGEN) body load labels.
Body loads specified by the BFA command can conflict with other specified body loads. See Resolution of Conflicting Body Load Specifications in the Basic Analysis Guide for details.
Graphical picking is available only via the listed menu paths.
This command is also valid in PREP7.