LS Dyna

LS Dyna

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

Warning unattached nodes in termal solve

    • javat33489
      Subscriber

      Hi all.

      I'm simulating drilling of an SPG ram. I need a temperature analysis, but at every step I see this warning:

      Why am I receiving it? The drill always touches the particles.

    • Reno Genest
      Ansys Employee

      Hello,

      You must have unattached nodes somewhere in your model. These nodes do not do anything, they are just floatting in space unattached to anything, and this is why they are ignored by the solver. You can use LSPP to show the unreferenced nodes:

      And delete the unreferenced nodes:

       

      Deleting the unreferenced nodes should get rid of the warning messages.

       

      Reno.

       

      • javat33489
        Subscriber

        Thanks for the answer. I tried cleaning up the loose elements, this is what happened:

      • javat33489
        Subscriber

        Help please

    • Reno Genest
      Ansys Employee

      Hello,

      Which solver are you using? Have you tried with the latest LS-DYNA solver? If you are a commercial customer, please create a support case:

      customer.ansys.com

      Then, send us the model and we will have a look.

       

      Reno.

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