Modelisation Problem

[Anonymous]

Hello,

You can see a picture of my modelisation.

I make a pipe in the middle and the others are cables.

But the problem with the cables is the instability

I want to know how i can resolve it

I try to put releases but the problem persits

What i need to do ?

Merci

[Rafal.Gaweda]

Hi

Fixed supports in nodes 1 2 9 10.

If it does not help please attach robot file to post

[Anonymous]

Good luck 😉

[Rafal.Gaweda · Accepted solution]

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@Anonymous wrote:

Good luck 😉

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Not luck needed  - knowledge and experience only 🙂

From

http://docs.autodesk.com/RSA/2012/ENU/filesROBOT/GUID-C718E208-2359-49A0-9C8E-FAB4EA49694-242.htm

"Limitations:

• For cable elements, a release definition is impossible, because bending and torsional rigidity do not apply to such elements."

-> bar 5 is unstable - it can rotate around X - either it can be neglected or RX support should be applied to eg node 8

PDelta analysis + Newton-Raphson method should be run

Corected model attached