No convergence of nonlinear problem with only one non-linear release curve

[jokiller70]

As soon as i use a release curve I get "No convergence of nonlinear problem".

Please help!

[Artur.Kosakowski]

Robot needs the value in the 0 point. In addition I set the FNR method.

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[jokiller70]

Can You help me how to do it from API(VB).

[Artur.Kosakowski]

Could you send me your code? What do you actually need:

- add 0, 0 point in the definition of release

- set FNR method for all cases and combinations

?

[jokiller70]

It is very long. I only need to know how to invoke the "matrix update after each iteration" from api, because that worked fine with 0,0 release point.

[jokiller70]

This is the code I am trying to use;

            comb = robapp.Project.Structure.Cases.CreateCombination(7, "Lastfall 1", I_CBT_SLS, I_CN_EXPLOATATION, IRobotCaseAnalizeType.I_CAT_COMB_NONLINEAR)

            Dim NL_Params As RobotNonlinearAnalysisParams
            NL_Params = comb.GetAnalysisParams
            NL_Params.PDelta = True
            NL_Params.MaximumNumberOfBFGSCorrections = 0
            NL_Params.MatrixUpdateAfterEachIteration = True
            comb.SetAnalysisParams(NL_Params)

[Rafal.Gaweda]

Example code:

Dim Robapp As New RobotApplication

Dim Scase As RobotSimpleCase
Set Scase = Robapp.Project.Structure.Cases.GetAll.Get(1)
Scase.AnalizeType = I_CAT_STATIC_NONLINEAR
Dim RNAP As RobotNonlinearAnalysisParams
Set RNAP = Scase.GetAnalysisParams
RNAP.MaximumNumberOfBFGSCorrections = 0
RNAP.MatrixUpdateAfterEachIteration = True
RNAP.MatrixUpdateAfterEachSubdivision = True
Scase.SetAnalysisParams RNAP

[Rafal.Gaweda]

Dim comb As RobotCaseCombination
Set comb = Robapp.Project.Structure.Cases.CreateCombination(7, "Lastfall 1", I_CBT_SLS, I_CN_EXPLOATATION, IRobotCaseAnalizeType.I_CAT_COMB_NONLINEAR)

            Dim NL_Params As RobotNonlinearAnalysisParams
            Set NL_Params = comb.GetAnalysisParams
            NL_Params.PDelta = True
            NL_Params.MaximumNumberOfBFGSCorrections = 0
            NL_Params.MatrixUpdateAfterEachIteration = True
            NL_Params.MatrixUpdateAfterEachSubdivision = True
            comb.SetAnalysisParams NL_Params

[jokiller70]

Still having problem with this as soon as I add release curves for bars 28 and 32

[Artur.Kosakowski]

Just make sure you define (0, 0) point in for all versions of releases. In addition I set FNR method.

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[jokiller70]

FNR?

[Artur.Kosakowski · Accepted solution]

Full Newton-Raphson. Check posts 4 and 5 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.