General Mechanical

General Mechanical

Problem in Ansys 18.1

    • ravi987

      A solver pivot warning or error has been detected in the UX degree of freedom of node 40 located in SYS-1Beam (I). This is usually a result of an ill conditioned matrix possibly due to unreasonable material properties, an under constrained model, or contact related issues.  Check results carefully. You may select the offending object and/or geometry via RMB on this warning in the Messages window.


    • Aniket
      Ansys Employee


      As the error message indicates, it is an underconstrained model. If you are doing a static structural analysis, Do a Modal analysis and see if you are observing any rigid body modes, which will indicate the requirements of additional constraints in the model.

      You can also right-click on the message and show problematic object if the option is shown.

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