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#60131 - 08/22/14 04:44 AM Batch run is not working in CAESAR II
msshakirkt Offline
Member

Registered: 11/17/11
Posts: 10
Loc: sindh Pakistan
I am trying to perform stress analysis of a steam piping system
after insertion of complete model inputs and run the error checker i try to batch run but its not working and not given any error only a window appears titled incore solver and two green progress bars shoing continues working but no result show.Model file CAESAR II is attached i am using version 5.30


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NEW STEAM LINE.C2 (303 downloads)
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#60134 - 08/22/14 08:54 AM Re: Batch run is not working in CAESAR II [Re: msshakirkt]
Dave Diehl Offline
Member

Registered: 12/14/99
Posts: 2382
Loc: Houston, TX, USA
Your model is unable to converge to a consistent support configuration for your load case 2 - your first operating case. If you press F2 during this step, the program will show the nonlinear restraints that are not converging in the latest iteration. (Your screen shot shows 5 restraints as unsettled.)
If you remove the friction from the +Y support at 490, the model will run. Looking at those results you can estimate how much friction you are "missing" here.

[Your iteration loop goes something like this...
1-friction reduces sliding, reduced sliding drops normal load, liftoff - remove Y restraint, rerun
2-without Y support there is no friction, slide is free, pipe position drops, return Y restraint, rerun
3-back to 1]

A few comments on your input:
++ These two restraints:
+X GAP=nn, mu=NN and -X GAP=nn, mu=NN
can be simplified to:
X GAP=nn, mu=NN
++ If GAP=0.00, it need not be specified
++ I question your termination at 490, there appears to be no moment restraint. Is it really a free end?
_________________________
Dave Diehl

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