Solids and Assemblies: Support and contact boundary conditions
Support and contact boundary conditions are defined to surface of part.
Set the coordinate system of the surface
 Select surfaces.
 Press Local Coordinate System checkbox from the ribbon tab.
 When the checkbox is checked, the coordinate system of the surfaces is the local coordinate system of the surface.
 When unchecked, the coordinate system is the global coordinate system of 3d model.
The degrees of freedom are defined in the coordinate system of the surface.
Local coordinate system is denoted by letter L in the Supports branch of study tree.
Define contact surface
 Select surfaces.
 Set Local Coordinate System for surfaces.
 Select Contact from contextual ribbon tab.
Set the degrees of freedom for surfaces
 Select surfaces.
 Press Xtranslation, Y tai Z to change the support definition of certain degree of freedom.
 Boundary condition definitions are set always in the selected coordinate system of the surface.
 Boundary condition options and their descriptions for noncontact surface are listed in the table below.
Symbol in ribbon tab  Symbol in study tree  Boundary condition definition  Description 

0  Fixed to connecting faces (default)  The degree of freedom for surface is fixed to connecting faces. The connecting faces must belong to active study. If connecting faces do not exist the degree of freedom is free.  
1  Fixed at location  The degree of freedom for surface is fixed at location. Its displacement is zero in the solution.  
2  Free  The degree of freedom surface is freed from connecting faces and location. 
 Boundary condition options and their descriptions for contact surface are listed in the table below.
Symbol in ribbon tab  Symbol in study tree  Boundary condition definition  Description 

0  Fixed to connecting faces  For X and Y coordinate
For Z coordinate (The surface normal)
 
2  Free  For X and Y coordinate
For Z coordinate (The surface normal)

Note!
The boundary condition definition for Z coordinate of contact surface should not have effect on results. It only modifies the initial state of contact iteration.
Define boundary conditions with preset
 Select surfaces from 3d model.
 Select preset from Presets dropdown menu of contextual ribbon tab.
 The preset function changes boundary condition definitions for all coordinate system directions (X, Y and Z) simultaneously.