Boundary Condition for Underground Berried Vessel
I am performing a Static Structural Analysis of mounded Bullets used for LPG gas Storage.
The vessel will be buried in the sand and the external loads will be acting on the shell due to sand load. I have applied load according to the above snap however I want to want to apply boundary conditions to prevent rigid body motion and have fixed end vertices on both dish end, and I am getting the error as "There is at least 1 small equation solver pivot term (e.g., at the UX degree of freedom of node 2692). Please check for an insufficiently constrained model."
If I fix the node in x,y,z direction it performs analysis however maximum stress occurs at that location.