When I calculate my modell i get the following error: instability of type 3 in RX direction
I have looked at the node but everything seems to be correct. I the releases box I have tried to tick off RX, but that did not help.
Solved! Go to Solution.
Open calculatin Report , find there Max min values on stiffeness matrix diagonal and write here these two values.
if the difference between these values is greater than 1e11 \ 1e12 program reports instability number 3.
It is related to big differences in stiffenes of elements for example very short elements exist in model = some inaccuracies.
You can check it this way: on dummy model select everything, make intersection, then open Bars table on View tab. Find shortests bars. Then locate nodes \ places on original model and correct location of nodes.
If it is not the case. Send me model. You already know how.