Body Load
Add a Body Load to boundaries (for the Plate interface add it to domains). The loads are defined in the given coordinate system.
Coordinate System Selection
The Global coordinate system is selected by default. The Coordinate system list contains all applicable coordinate systems in the model. Prescribed loads are specified along the axes of this coordinate system. See Coordinate Systems and in the COMSOL Multiphysics Reference Manual.
Force
Select the Load type — Force per reference volume, Force per deformed volume, or Total force. Enter values or expressions for fV, fv, or Ftot.
The list selection normally only contains User defined. When combining the Shell interface with another physics interface, it is also possible to select a predefined load from this list.
Moment
Select the Moment type — Moment per reference volume, Moment per deformed volume, or Total moment. Enter values or expressions for mV, mv, or Mtot.
Linear Buckling
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog.
If you are performing a linear buckling analysis with a combination of live and dead loads, select the Treat as dead load checkbox to indicate that the load contributions from this node are constant. The default is that a load is proportional to the load factor.
For more information about live and dead loads, see Buckling Analysis.
 
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You can add the Phase subnode to specify the phase of this load in a frequency domain analysis.
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You can specify this load to be a Harmonic Perturbation in a frequency domain analysis.
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You can assign this load to a load group. See Load Cases in the Structural Mechanics Modeling chapter.
Location in User Interface
Context Menus
Shell > Face and Volume Loads > Body Load
Plate > Face and Volume Loads > Body Load
Ribbon
Physics tab with Shell selected:
Boundaries > Face and Volume Loads > Body Load
Physics tab with Plate selected:
Domains > Face and Volume Loads > Body Load