Reply To: Unable to converge

[pgl]

Sounds like a large deflection buckling simulation? If you are using Workbench then take a look at the product documentation Static Structural Analysis section starting on page 316. In that section review the following:

• Establish Analysis Settings (page 318) - See the note about Large Deflection 

Also see these important sections

• Large Deflection (Page 843)


• Nonlinear Controls (page 860)

If you are old school and using ANSYS M-APDL then lookup the command NLGEOM,ON

Here's some scholarly articles on box girder simulations using ANSYS found on the web: 

• Analysis of Box Girder Using ANSYS


• 3D FE modelling of composite box Girder Bridge - Epoka University