How to solve the error of ERROR # 941 ?
Altair EmployeeI have met this error
*** ERROR # 941 ***
NON-CONVERGENT NONLINEAR ITERATIONS FOR SUBCASE 2
Suggestions:
* Friction or STICK can cause more difficult nonlinear convergence - if feasible
try frictionless gap/contact.
Or try stabilized version of expert system: PARAM,EXPERTNL,CNTSTB.
* This problem has gap elements with friction or stick condition. For more
intuitive results and often better convergence, set GAPOFFS on GAPPRM card
to AUTO. (This may violate rigid body balance, especially for unsupported
structures.)
And I have read the reference article at here by @Prakash Pagadala 's reply
Can you increase the NINC and MAXITER values in NLPARM card and check if your run converges or not?
Also, use PARAM,EXPERTNL,YES and CONTPRM,STIFF,SOFT
and I have changed like that but it still can't convergence
1. NINC → 30
2. DT → 0.01
3.MAXITER → 45
and at here I also set contact of SOFT, PARAM → EXPERTNL → YES and open CNTSTB (in load collector)
My model has pretension groups of 8, contact groups of 80 and I have plused gravity on it.
How can I change to solve this error in effect?
This is my out file
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I also have a question can I first to run a pretension by a case.
Maybe we will have a h3d file of it.
So we can use this h3d result to add in other case and it will run without the solved time.
Because I know we can set 2 loadcase in a file but if today we have many project to solve.
And at the loadcase 1 they are the same, they just different at loadcase 2.
We can bypass the time of loadcase 1.
This idea just like the superelement and How can I do this.