RAM Advanse: Error message for a non-existent member
RAM Advanse: Error message for a non-existent member
(OP)
I have been getting a very unusual error in the analysis of the latest revision of my structure, a tall, wide but slim structure. This is how it read:
"Error: Instability Found @ Node Rigid end J for member 521 (2.55, 6.04, 1.22) @ DOF UZ. Check the Element End Releases or Any Boundary Conditions Defined at the Node. Analysis cancelled."
When I tried to locate member 521, I find that there is *NO* such member! and got a warning that, "Member 521 does not exist. Unable to select it."
Has any one of us come across this error message before? I would think that it is unusual for RAM to find a problem with a member that does not exist. Why is RAM Advanse advising me of instability with a member that apparently does not exist?
Thanks in advance for all your advice and suggestions.
"Error: Instability Found @ Node Rigid end J for member 521 (2.55, 6.04, 1.22) @ DOF UZ. Check the Element End Releases or Any Boundary Conditions Defined at the Node. Analysis cancelled."
When I tried to locate member 521, I find that there is *NO* such member! and got a warning that, "Member 521 does not exist. Unable to select it."
Has any one of us come across this error message before? I would think that it is unusual for RAM to find a problem with a member that does not exist. Why is RAM Advanse advising me of instability with a member that apparently does not exist?
Thanks in advance for all your advice and suggestions.






RE: RAM Advanse: Error message for a non-existent member
RE: RAM Advanse: Error message for a non-existent member
Now, I've got another problem, different from the one above. In running the p-delta analysis for my model, I am getting numerous, "Iterative analysis for (load combination) failed." errors referring to my various load combinations. (Note: This error doesn't appear when I am running it for first order analysis, and not the p-delta analysis, though. Why the difference, and can I just accept the first order analysis as sufficient?)
Now what is RAM trying to tell me? Can anyone of you suggest what is the best way to debug my model to see where it is failing? Thanks in advance.
RE: RAM Advanse: Error message for a non-existent member
P-delta is an iterative non-linear analysis then in some load cases probably do not converge, you can change the parameters in the analysis form,like increse iteration number or iteration steps or decrese the tolerance the parameters by default are:
Number of steps= 1
Number of Iteration= 10
Tolerance = 1.0e-5
then you can chane those parameteros to:
Number of steps= 2
Number of Iteration= 100
Tolerance = 1.0e-3
try this, please