Hi all,
I have warning comments while analysing model for checking lifting lug with dead load alone../
Anyone plz guide me that this model is correct or i have done anything wrong../
1731.std
The instability warning is reported, because the strcuture is not restrained for rotation about the global X axis. Change the support type from PINNED to FIXED BUT MY MZ and this warning will disappear.
Answer Verified By: DHINESHKUMAR RAJAVEL
THANKYOU FOR YOUR REPLY../
BUT MY QUERY IS WHILE LIFTING THE STRUCTURE IT SHOULD TO ACT AS PINNED SUPPORT ONLY IN LIFTING LUG REGION.../
I think there must by some lateral resistance (even a very small) from torsion around global x axis. So you can either included MX torsional restraint or translational restraint in global Z at some point on the structure.