Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › How to decrease the run time for an SPH analysis in LS-DYNA. › Reply To: How to decrease the run time for an SPH analysis in LS-DYNA.
November 1, 2021 at 5:36 pm
Jim Day
Ansys Employee
100,000 seconds = 28 hours. I don't think you mentioned the explicit time step size, but forget about running for 100,000 seconds as a means of circumventing the warnings as that would likely entail running billions of time steps. If your material misbehaves when using a reasonable loading rate (run duration of no more than 1 to 10 seconds, for instance), the trouble is almost assuredly bad input. Check and recheck your units. All your input must use a consistent unit system.
Also, run a double precision executable of LS-DYNA and use a recently released version and not one that is several years old.
If you get stuck, create a one-element model using your mat 107 input and run some trials. That may cast some light on things.
Also, run a double precision executable of LS-DYNA and use a recently released version and not one that is several years old.
If you get stuck, create a one-element model using your mat 107 input and run some trials. That may cast some light on things.
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