Mechanical APDL Basic Analysis Guide

(Axel Boer) #1

structural solid elements, radiation specifications on thermal solid elements, etc. In such cases, you can
overlay the surface where you want to apply the load with surface effect elements and use them as a
"conduit" to apply the desired loads. Currently, the following surface effect elements are available:
SURF151 and SURF153 for 2-D models and SURF152,SURF154,SURF156, and SURF159 for 3-D models.


2.5.8. Applying Body Loads


The following table shows all body loads available in each discipline and their corresponding labels:


Table 2.7: Body Loads Available in Each Discipline


Discipline Body Load Label
Structural Temperature TEMP[ 1 ]
Frequency FREQ 2
Fluence FLUE
Thermal Heat Generation HGEN
Rate
Magnetic Temperature TEMP[ 1 ]
Current Density JS
Virtual Displace- MVDI
ment VLTG
Voltage Drop
Electric Temperature TEMP[ 1 ]
Volume Charge CHRGD
Density
Diffusion Diffusing Substance DGEN
Generation Rate
Acoustic JS Mass source or mass source rate
IMPD Impedance sheet
CHRGD Static pressure
TEMP Temperature
VELO Velocity or acceleration


  1. Do not confuse this with the TEMP degree of freedom.

  2. Frequency (FREQ) is available for harmonic analyses only.


The following table shows the commands to apply, list, and delete body loads. You can apply them at
nodes, elements, keypoints, lines, areas, and volumes.


Table 2.8: Commands for Applying Body Loads


Location Basic Commands Additional Commands
Nodes BF,BFLIST,BFDELE BFSCALE,BFCUM,BFUNIF
Elements BFE,BFELIST,BFEDELE BFESCAL,BFECUM
Keypoints BFK,BFKLIST,BFKDELE -
Lines BFL,BFLLIST,BFLDELE -
Areas BFA,BFALIST,BFADELE -
Volumes BFV,BFVLIST,BFVDELE -

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