Use a Point Load, Free node to add concentrated loads with locations specified by coordinates. Such loads do not have to be placed in a geometrical point or in a mesh node. This is particularly useful for the following cases:
The Point Load, Free node is only available with some COMSOL products (see
https://www.comsol.com/products/specifications/). It is available in 3D, 2D, and 2D axisymmetry.
Select a Frame —
Material or
Spatial, which determines how the given coordinates are interpreted in case of a geometrically nonlinear analysis. When
Material is selected, the load location on the body is interpreted with respect to the initial configuration. When
Spatial is selected, then the load location is given in space fixed coordinates, which usually means that the material point on the body where the load is applied will change with deformation even if the coordinate values are constant.
For each row in the table, enter the data for one load. If material frame input is used, then the location is specified in terms of the material coordinates (X,
Y,
Z). If spatial frame input is used, then the spatial coordinates (
x,
y,
z) are used. Then, enter the force values,
Fxl,
Fyl, and
Fzl. The force vector is interpreted in the coordinate system selected in the
Coordinate System Selection section.
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.
) and select Advanced Physics Options in the Show More Options dialog box.
