Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
error message of Singular matrix in nitsche contact
Posted 15 mag 2024, 09:55 GMT-4 0 Replies
Please login with a confirmed email address before reporting spam
When the same problem is solved by penalty and augmented Lagrangian there is no error. But with nitsche, there's the following error:
- Feature: Stationary Solver 1 (sol17/s1) Failed to find a solution for the initial parameter. Singular matrix.
There are 264 void equations (empty rows in matrix) for the variable comp1.solid.Wfric_p1. at coordinates: (2.65789e-18,0.0248165,-0.0434066), (2.16489e-18,0.0353553,-0.0353553), (1.51957e-18,0.0434066,-0.0248165), (7.86146e-19,0.0483235,-0.0128387), (1.8747e-34,0.05,-3.06162e-18), ...
and similarly for the degrees of freedom (empty columns in matrix). Returned solution is not converged. Not all parameter steps returned.
Hello Carl Xu
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.