Edge Load
Add an Edge Load to 3D components to apply a force distributed along an edge.
Shell Properties

Force
Select a Load typeForce per unit length or Total force. Then enter values or expressions for the components in the matrix based on the selection:
The total force Ftot. COMSOL Multiphysics then divides the total force by the volume where the load is active.
After selecting a Load type, the Load list normally only contains User defined. When combining with another physics interface that can provide this type of load, it is also possible to choose a predefined load from this list.
Linear Buckling
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box.
If you are performing a linear buckling analysis with a combination of live and dead loads, select the Treat as dead load check box to indicate that the load contributions from this node are constant. The default is that a load is proportional to the load factor.
 
You can add the Phase subnode to specify the phase of this load in a frequency domain analysis.
Location in User Interface
Context Menus
Ribbon
Physics tab with Solid Mechanics or Multibody Dynamics selected:
Physics tab with Layered Shell selected: