Static Analysis Solving for Long time

- July 4, 2024 at 2:41 am
  
  G_G_K
  Subscriber
  
  Hi There,
  I am trying to do a stress anlayis on a part of vehicle tub. Using the symmetry(1/2) of this model. Its a complex model with several parts. The solver takes long time to solve, doing iterations for several hours.
  I am posting some of the last few iterations, and I just would like to know if the solver is struggling to converge on to solution, and does this mean there is a possible error in the model.
  Iteration= 7185 Ratio= 967391. Limit= 1.000000E-08 Wall= 68250.9
  Iteration= 7195 Ratio= 1.296625E+06 Limit= 1.000000E-08 Wall= 68347.3
  Iteration= 7205 Ratio= 1.323622E+06 Limit= 1.000000E-08 Wall= 68442.8
  Iteration= 7215 Ratio= 1.107598E+06 Limit= 1.000000E-08 Wall= 68537.
  Thank you
- July 10, 2024 at 3:54 pm
  
  Chris Quan
  Ansys Employee
  
  Ratio seems to be very high.
  Are you running a linear analysis or a nonlinear analysis with Large Deflection turned on?
  If it is a nonlinear analysis, can you trun off Large Deflection to test the model to see if it runs?
  Also, if the model size is not very large and you have a sufficient memory in your computer, can you change the Solver Type to Direct (see attached picture below) to see if the model runs?