Ansys Learning Forum Forums Discuss Simulation LS Dyna General Contact’s tolerance in Modal Analysis Reply To: General Contact’s tolerance in Modal Analysis

igandiko
Ansys Employee

Any contact in modal analysis will be treated as a tied contact if the surfaces are "sufficiently" close. If there is too much gap between the surfaces, you can increase SAST/SBST parameters (for shells) or SLDTHK parameter (for solids). 

*CONTACT_AUTOMATIC_SINGLE_SURFACE_TIED could be more convenient option since it has "CLOSE" parameter to define "closeness" tolerance. 

Â