The force boundary condition applies a distributed force on the structure. It can be applied to faces or edges of a structure. It is applied as surface/line traction on each element of the assigned topological entity and its value is proportional to each element’s area/length.

The user has to define the force components in the global coordinate system. Each force component can be applied as constant value, function or table. For function or table input the value can depend on time (or frequency respectively) or spatial coordinates.