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Beam error 9137

Creator
Creator

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

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

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

Creator
Creator

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

Re: Beam error 9137

Solution Partner Phenom Solution Partner Phenom
Solution Partner Phenom

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

Creator
Creator

Thank you very much!

Simun