Eigenvalue buckling stress stiffness matrix
Eigenvalue buckling stress stiffness matrix
(OP)
I have been asked to do an eigenvalue buckling analysis of an externally loaded pressure vessel (a submersible). The primary loading is obviously the hydrostatic pressure but there is also a number of other loads which do not vary with depth.
Can anyone tell me if there a way of using only the stress stiffness matrix accociated with the pressure loading without also scaling the other non-variable loads in the eigenvalue buckling problem?
Thanks in advance for any advice offered.
Can anyone tell me if there a way of using only the stress stiffness matrix accociated with the pressure loading without also scaling the other non-variable loads in the eigenvalue buckling problem?
Thanks in advance for any advice offered.





RE: Eigenvalue buckling stress stiffness matrix
You must scale your forces until the buckling coeff. is 1. (you must iterate manually)
RE: Eigenvalue buckling stress stiffness matrix
I am aware of the iterative approach described in the manual, i was just hoping there was a more automated approach to the problem. I would ideally like to be able to extract the first fifty modes but given the size of the problem it would be a real pain to to this manually.