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  2. Structures - General
  3. When solver output shows the step information, I found the time delay at each time step is different. For example, first few time steps take 2 second. Then the next time step takes 5 seconds before it goes back to normal 2 seconds. Is there a reason for that?

When solver output shows the step information, I found the time delay at each time step is different. For example, first few time steps take 2 second. Then the next time step takes 5 seconds before it goes back to normal 2 seconds. Is there a reason for that?

Tagged: 2019 R1, Explicit - AUTODYN, mechanical, solution-problems, structural-mechanics
    • March 17, 2023 at 9:00 am
      FAQFAQ
      Participant

      Actually there are nothing wrong with model setup. It is true that at some cycles, the program is running slow because it needs to update all contact pairs. Since automatic contact algorithm is used, program needs to check the contacts from time to time to make sure new contacts are added to computation and the obsolete contacts are removed from computation, due to material deformation and motion. This contact updates are done at strategic time steps, rather than every time step, so model could run more efficiently.

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