Problem in Ansys 18.1

- November 20, 2018 at 4:53 am
  
  ravi987
  Subscriber
  
  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.
- November 20, 2018 at 12:48 pm
  
  Aniket
  Ansys Employee
  
  ravi987,
  
  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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