In the Deflection tab of the 'Edit Surface' dialog, you can make the settings for the deflection verification of the surface.
Deflection Verification
Determine the deflection limit values to be applied in the verification by setting the 'Surface Type'. They are stored in the Serviceability Configurations dialog for different design situations for surfaces with both-sided or one-sided support.
The 'Displacement Reference' controls which reference model is used for the verification of deformations. The list contains three options:
- Deformed User-Defined Reference Plane: If the supports show very different displacements, you should specify an inclined reference plane for the displacement uz to be verified. Define the plane in the 'User-Defined Reference Plane' section by three points of the undeformed system. RFEM determines the deformation of the three definition points, lays the reference plane through these displaced points, and uses the related maximum deformation uz for the verification.
- Parallel Plane at the Location of the Minimally Deformed Node: This option is recommended when the surface has a compliant support. The maximum deformation uz is referred to a reference plane shifted parallel to the undeformed system, which RFEM lays through the node with the smallest displacement value uz,min.
- Undeformed System: The local deformations uz are directly taken from the results and used for the verification.
The deflection limit value depends on the 'Reference Length' Lz. In the definition type options 'According to Maximum Boundary Line' and 'According to Minimum Boundary Line' (default), RFEM determines the length of the longest or shortest edge from the surface geometry and sets the reference length automatically. If you wish to define the reference length, select 'Manual' as the definition type from the list and then enter the value.
