BFK, Kpoi, Lab, VAL1, VAL2, VAL3, PHASE
Defines a body force load at a keypoint.
KpoiKeypoint to which body load applies. If ALL, apply
to all selected keypoints [KSEL]. A component
name may also be substituted for Kpoi.
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 | |
| MVDI | magnetic virtual displacements flag | |
| Electric | TEMP | temperature |
| CHRGD | charge density | |
| Acoustic | JS | mass source or mass source rate |
| TEMP | temperature |
All keypoints on a given area (or volume) must have the same BFK table name for the tables to be transferred to interior nodes.
VAL1, VAL2, VAL3Value associated with the Lab item or a table name for specifying tabular boundary conditions.
Use only VAL1 for TEMP, FLUE, HGEN, MVDI
and CHRGD. For magnetics, use VAL1, VAL2, and VAL3 for the X,
Y, and Z components of JS . For acoustics, if Lab = JS, use VAL1 for mass source in a
harmonic analysis or mass source rate in a transient analysis, and
ignoreVAL2 and VAL3. When specifying a table name, you must enclose the table name in
percent signs (%), e.g., BFK,Kpoi,Lab,%tabname%. Use the *DIM command to define a table.
PHASEPhase angle in degrees associated with the JS label.
Defines a body force load (such as temperature in a structural analysis, heat generation rate in a thermal analysis, etc.) at a keypoint. Body loads may be transferred from keypoints to nodes with the BFTRAN or SBCTRAN commands. Interpolation will be used to apply loads to the nodes on the lines between keypoints. All keypoints on a given area (or volume) must have the same BFK specification, with the same values, for the loads to be transferred to interior nodes in the area (or volume). If only one keypoint on a line has a BFK specification, the other keypoint defaults to the value specified on the BFUNIF command.
You can specify a table name only when using temperature (TEMP) and heat generation rate (HGEN) body load labels.
Body loads specified by the BFK 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.