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LS Dyna

LS Dyna

Topics related to LS-DYNA, Autodyn, Explicit STR and more.

Explosion calculation in explicit/autodyn

    • javat33489
      Subscriber

      Hello everyone.
      I'm simulating an urban blast calculation in the explicit module, but first I put together a small test problem.
      I need help with some settings.
      1. I have three solid bodies: a cylinder, a TNT charge (a sphere), and air (a cube surrounding everything).
      The TNT charge and air are Eulerian solids, and the cylinder is a Lagrange solid.


      The mesh has 70,000 elements.


      2. I set the calculation time to 0.001 since the model is small. For a large model, the calculation time is 1-15 ms because it includes a large building.


      3. I also adjusted the SPH speed time and the number of cells for my model, and I increased the number of result records to 200 (see images).
      4. The calculation time is 10 minutes. I also configured the solver to Autodyn.


      5. I display the results: Total Deformation (for the body around the charge), Pressure (expression), ALPHAALL (expression).
      These are the results I see:

      6. Now I want to see how the explosion waves propagate and make a nice animation, like this:

      How do I do this?
      Thanks!

    • Ashish Khemka
      Forum Moderator

      Hello,

      Ansys employees may not be able to answer this query. Please wait for other members to comment.

      Regards,

      Ashish Khemka

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