Mechanical APDL Basic Analysis Guide - Ansys

CASE C: At least one BFV, BFA, or BFL cannot transfer to elements.
Elements not getting a direct BFE transfer from a BFV, BFA, or BFL will have their body loads determined
by the following: (1 - highest priority) directly defined BFE loads, (2) BFK loads, (3) BFL loads on an attached
line that did NOT transfer to line elements, (4) BFA loads on an attached area that did NOT transfer to area
elements, (5) BFV loads on an attached volume that did NOT transfer to volume elements, (6) directly defined
BF loads, or (7) BFUNIF loads.
In "Case C" situations, the following conflicts can arise:
• A BFL specification can conflict with a BFL specification on an adjacent line (shared keypoint).
• A BFL specification can conflict with a BFK specification at either keypoint.
• A BFA specification can conflict with a BFA specification on an adjacent area (shared lines/keypoints).
• A BFA specification can conflict with a BFL specification on any of its lines.
• A BFA specification can conflict with a BFK specification on any of its keypoints.
• A BFV specification can conflict with a BFV specification on an adjacent volume (shared
areas/lines/keypoints).
• A BFV specification can conflict with a BFA specification on any of its areas.
• A BFV specification can conflict with a BFL specification on any of its lines.
• A BFV specification can conflict with a BFK specification on any of its keypoints.
The ANSYS program transfers body loads that have been applied to the solid model to the corresponding
finite element model in the following sequence:
1. In ascending volume number order, BFV loads transfer to BFE loads on volume elements, or, if there
are none, to BF loads on nodes on volumes (and bounding areas, lines, and keypoints).
2. In ascending area number order, BFA loads transfer to BFE loads on area elements, or, if there are
none, to BF loads on nodes on areas (and bounding lines and keypoints).
3. In ascending line number order, BFL loads transfer to BFE loads on line elements, or, if there are none,
to BF loads on nodes on lines (and bounding keypoints).
4. BFK loads transfer to BF loads on nodes on keypoints (and on attached lines, areas, and volumes if
expansion conditions are met).
Accordingly, for conflicting solid model body loads in "Case C" situations, BFK commands overwrite BFL
commands, BFL commands overwrite BFA commands, and BFA commands overwrite BFV commands. For
conflicting body loads, a body load specified for a higher line number, area number, or volume number
overwrites the body load specified for a lower line number, area number, or volume number, respectively.
The body load specification issue order does not matter.
Note
Any conflict detected during solid model body load transfer produces a warning similar to the
following:
***WARNING***
Body load TEMP from line 12 (1st value=77) is overwriting a BF on
node 43 (1st value=99) that was previously transferred from another
BFV, BFA, BFL or set of BFK's.
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2.5.8. Applying Body Loads
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