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Non-linear - fel massage 4551

Hi, I am a bigginer in the FEMAP program and I am running a non-linear solution with MSC/MD Nastran to solve the analysis for a blade in winde turbine. I got a fel massage 4551 which saide :

 

''STOPPED PROBLEM DUE TO FIVE CONSECUTIVE DIVERGING TIME
STEPS.
User information:
A solution is not possible. Review NLPARM requests and modify
to select a better solution approach.''

 

I wonder if you have an idea about this problem??? Is there connection with the time step ? or number of iteration?