Learning Forum

[Sundarram]

Hi Peter/ others,

I have a shell body ( Midsurface) with Beams (C channel and Tubular) welded to it. I used beam elements from Ansys space claim. Created Mid surface from solidbody imported from NX. I wanted to do Hydrostatic pressure study for stress and deformation inside my tank ( Midsurface body). After giving bonded contact with beam elements and my surface body. I tried solving it. I am getting an error "Solver pivot warnings have been encountered during the solution. 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." Can anyone help me with this pls?

Update: I switched off Solver pivot in analysis settings. Now I a

Tank Study Simulation Updated.wbpz

[Aniket]

Ansys staff can not download files on the student portal, so if you want to reach a larger audience to get answers from, please insert the images inline.nPrimary diagnostics would be the model is not properly constrained. Try doing a Modal analysis and see if you can find any rigid body modes. If there are, try to fix them and try running the analysis again.n-AniketnHow to access Ansys help linksnGuidelines for Posting on Ansys Learning Forumn

[Sundarram]

Attaching few imagesnnnnCan help me solve the issue?.n

[Sundarram]

HI Aniket/others,nSorry to bother you. Any help is appreciated.n

[peteroznewman]

nPlease don't post duplicate discussions.n/forum/discussion/23411/pls-help-me-solve-this-error#latestn

[Aniket]

Please do a Modal analysis first with the same BCs and see if you see any zero-frequency modes. Check those modes and try to constrain them as per Peter's suggestions in the other theread.n-AniketnHow to access Ansys help linksnGuidelines for Posting on Ansys Learning Forumn