General Mechanical

General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

Pivot Warnings with surface model

    • Tim Rudloff

      Hello all,

      I've build up a larger assembly out of surface elements. The next picture shows how the assembly looks in general.

      When I do a simulation on this I get no problems, but I receive a Warning and an Error, when I add the surface in the next picture.

      "Solver pivot warnings have been issued during the solution. This is usually due to a poorly conditioned matrix due to inappropriate material properties, an underdefined model, or contact problems. Check your results carefully."

      "The equation solver has determined a pivot warning or a pivot error for the degree of freedom UZ of node 18728 in ship section 2D-1@surface-plane16. The reason is usually a poorly conditioned matrix due to incorrect material data, insufficient storage, or problems with contacts. Check the results carefully. You can select the affected object by right-clicking the message."


      The next picture shows how I connected the two surfaces.


      I have already spent quite a bit of time on this, so I would be grateful to get a hint on how to fix this problem.


      Kind regards



    • Ashish Kumar
      Forum Moderator

      Hi, can you create a named selection for node - 18728 and see which part is giving you the issue? A modal analysis will help as well to visualize the free part.


      Ashish Khemka

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