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convergence problem combin39

  • Thread starter Thread starter nicnoc
  • Start date Start date

nicnoc

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Bye to all,
I have to simulate the behavior of a cable, therefore resistant only to traction, for the moment linear elastic behavior. I therefore thought of using the combin39 element, imposing the keyopt(2)=1 to make it react only to traction.
I created a special snippet in workbench to impose on the spring element to "become" combin 39 instead of combin14.
All right, read me the element when I go to see the solver output. the problem comes immediately after, the analysis does not end, tells me that there are problems of convergence because probably the model is poorly bound, which with the combin14 element did not happen. So I don't think the model is actually poorly bound.

for the definition of the combin39 element I used the following snippet

et,_sid,combin39,0,0,0,0,1
r,_sid,"shift value to point 1","force value to point 1"
 
changing the force convergence settings and adding energy stability, I can achieve convergence.
However I can not view neither on ansys workbench nor on ansys classic the normal effort agent on the cable. How do I view it?
Thank you all in advance and good night.
 
I'm trying to use 180 links. I can't do that. the problem is that I am very unfamiliar with classical ansys. the model I have is made entirely on ansys workbench. I can't impose on a beam element to become a link180
the snippet that I attach to the element ("environment" geometry of workbench) is the following
et,791,link180,1,1
sectype,791,link
secreted, 314.159

I can not automatically define the type of element in automatic (791 because it is the 791th beam I designed)
 
So I get this error, though:

for element type = 791 (link180), keyopt(1) = 1 is an undocumented
option.

then I tried to change the snippet in the following way (in red where the change):
a,791,link180,1,1sectype,791,link
secreted, 314.159

But it stops and doesn't solve me.. .

with the previous way I get a solution and the desired items are link180. However, it is quite wrong.
 

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