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Beam error 9137

I have a big problem with pretty easy task. I did analysis with beam elements in Abaqus but I cannot repeat that in Femap. I have curved geometry and I tried with curved beam, normal beam and parabolic beam element  but I always get same error. Usually when i get this error I deal with constraints so I did this but didnt work and I tried to increase matrix ration to 10e+25 and ksrot to 1 but again, same error. I did Eigenvalue analysis but fist 10 natural frequencies are too low so I still think that constraints are problem.Please if you have suggestion write it. 

Thanks 

 

4 REPLIES

Re: Beam error 9137

Dear Sime,

NX NASTRAN do not support parabolid CBEAM elements, please post your FEMAP model here and we can take a look to it to know exactly the reason of the error.

To learn more about CBEAM elements please visit my blog in the following address:

https://iberisa.wordpress.com/2011/04/18/offset-en-elementos-cbarcbeam/

Best regards,
Blas.

escalera_tensiones_combinadas.png

 

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: Beam error 9137

Sorry Blas,

I seen that mistake, I havent used parabolic elements,just curved beam and beam

I uploaded my file here but bear in mind these results are with parametar bailout set to -1 so translation is too low. I'm very grateful for your response

Thanks

Simun

Solution
Solution
Accepted by topic author sime
3 weeks ago

Re: Beam error 9137

Dear Simun,

All your CBEAM elements (minus ONE) are defined as TAPERED, but properties at both ends are the same, then I don't know if you are aware of this important "detail":

TAPERED-BEAM.png

The following plot shows both element properties in the model:

TAPERED-BEAM2.png

I will convert all elements to follow PROPERTY#2 of a TUBE with radius 27.5 mm.

Instead to apply loads & constraints in mesh, I suggest to apply to geometry (both points & curves), then error debugging is easy and the model setup is more clear.

The loads & constraints applied to the model are the following:

SIMUN1.png

And here you are the displacement results:

simun-ures-animated.gif

Best regards,
Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: Beam error 9137

Thank you very much!

Simun