Hi,
I have a model where i have one final instability that i cannot figure out - a node sits on a pinned-pinned member (Ry, Rz release one end, Ry Rx the other) and it says that it has an insability in Ry direction (which i think is Ry global? - i.e. Rx in the member axes).
I have attached a screenshot, and the model - would someone be able to explain to me why the node is still unstable?
thanks!
Solved! Go to Solution.
Solved by Rafal.Gaweda. Go to Solution.
Possible reasons : http://forums.autodesk.com/t5/forums/searchpage/tab/message?location=forum-board%3A351&q=instability...
Try this addin
The reason:
That looks like a really useful plugin - thank you i will have a look at it.
So the instability isn't actually anything to do with the node it is saying - it is just a result of the way that the matrix is set up? Is this the case for any type 3 instability? Sorry just trying to understand so that i can correct my own models in the future!
Is this the case for any type 3 instability?
In case of instability type 3 it may not point directly to node with so called "problem".
In such case you should look for short elements in your model first.