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Static equilibrium

Hamed Hani
Hello Adams Community,
 
I am using Adams MaxFlex to run a nonlinear simulation.
 
I am generating the bulk data file in my code and importing the resulting `BDF` file into my model.
 
My model runs perfectly fine when I use a coarse mesh size like this image(the diameter of the circle is 4 cm):
5
But, as soon as I try a finer mesh size (dividing by 2) like this image, I get static equilibrium simulation convergence error(I don't change anything else about the model).
10
I tried to tweak the solver settings as it is suggested in this article:
 
 
I tightened and loosened the limits on translations (TLIMIT) and rotations (ALIMIT) while I relaxed the error, but had no success getting the simulation to converge. I increased the MAXIT value for convergence, but still no success.
 
Does anyone have any idea what might cause this problem?
 
solver
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  • 0
    Hi,
    you may want to play way more with the Imbalance, Stability... a single try with the Imbalance is likely not to work. check equilibrium in SimCompanion and read a few articles. practice will make you succeed
    the error/delta in your image are over the roof, they point to motion_r3 which may be at fault, maybe not.
    this is normally user error, make sure there are no lose parts, otherwise these will continuously fall in space (if you use gravity) and never reach equilibrium. Try running a very short dyn (0.1-0.5s) simulation with a non coarse time step (~0.01) and find out if something moves out of rance.
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  • 0
    Hi,
    you may want to play way more with the Imbalance, Stability... a single try with the Imbalance is likely not to work. check equilibrium in SimCompanion and read a few articles. practice will make you succeed
    the error/delta in your image are over the roof, they point to motion_r3 which may be at fault, maybe not.
    this is normally user error, make sure there are no lose parts, otherwise these will continuously fall in space (if you use gravity) and never reach equilibrium. Try running a very short dyn (0.1-0.5s) simulation with a non coarse time step (~0.01) and find out if something moves out of rance.
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