Mechanical APDL Basic Analysis Guide - Ansys

Chapter 2: Loading
Figure 2.13 BFE Load Locations for Shell Elements
VAL5
I
VAL1
VAL8
L
VAL2
VAL6
J
VAL4
K
VAL7
VAL3
• Line elements (BEAMnnn, LINKnnn, PIPEnnn, etc.) are similar to shell elements; the locations for body
loads are usually the pseudo-nodes at each end of the element.
Figure 2.14 BFE Load Locations for Beam and Pipe Elements
• In all cases, if degenerate (collapsed) elements are involved, you must specify element loads at all of
its locations, including duplicate values at the duplicate (collapsed) nodes. A simple alternative is to
specify body loads directly at the nodes, using the BF command.
2.5.8.2. Specifying Body Loads for Keypoints
You can use the BFK command to apply body loads at keypoints. If you specify loads at the corner keypoints
of an area or a volume, all load values must be equal for the loads to be transferred to the interior nodes of
the area or volume. If you specify unequal load values, they will be transferred (with linear interpolation) to
only the nodes along the lines that connect the keypoints. Figure 2.15 (p. 43) illustrates this:
You can use the BFK command to specify table names at keypoints. If you specify table names at the corner
keypoints of an area or a volume, all table names must be equal for the loads to be transferred to the interior
nodes of the area or volume.
42
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.