Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
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.
No convergent results in nonlinear structural mechanics.
Posted 28 nov. 2013, 08:07 UTC−5 Structural Mechanics Version 4.3b 0 Replies
Please login with a confirmed email address before reporting spam
Everything work well for both eigenfrequency and frequency domain study, when the initial stress is not added in the linear elastic materials, which means that the geometrical nonlinearity is not considered.
When initial stress is added in the linear elastic materials and the 'including geometrical nonlinearity' below the study node is also selected, for simple structure, COMSOL also can obtain right results in both eigenfrequency/frequency domain studies. However, for some complex structures, COMSOL can not get a solution and usually return the message "failed to find a solution, ***, without convergency". Even without the message, the obtained results are obviously wrong, such as outlet power/inlet power > 1.
Is there some tricks in the solver setting, that can improve the convergency problem to get the correct solutions. It is hunting me for a long time.
Hello Yong LI
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.