How to save state of each analysis and combine them after

[erol kalkan]

Hello,

My question is as follows, any help will be really appreciated.

I need to perform seperate analyses on a model at each single step (it is like quasi-static analysis), but at each analysis case I need to save the state of analysis.

Then starting to the next step I have to combine the states from those analysis so that my stiffness matrix should reflect the contribution of three seperate runs. Then in the second step, I should have new conbined stiffness matrix. I need to do the same procedure at each step.

So the important part, analyses should be seperate not following each other and at the end of the analyses I need to recover the state of each runs and construct the new stiffness matrix.

Hopefully it is clear enough, I guess there should be some way of saving the state of runs and retrieve them later.
Thanks

Erol Kalkan
University of California Davis
Civil & Environmental Engineering Department
One Shields Avenue, 2001 Engineering III
Davis, California 95616

ekalkan@ucdavis.edu
Phone: (530) 754-4958
Fax:(530) 752-7872

[fmk]

you can save the state of the model using the database command & restore that state later .. you cannot combine states by adding them up if that is what you are suggesting .. this is nonlinear analysis and that makes no sense .. after you restore a state you return to that state; that moment in time during the analsysis you were at when you saved the state.

[erol kalkan]

Hi Frank,

Thanks for the reply,
Yes I want to combine the states, I know that they are nonlinear. We are working some approximate methods. So is it possible to add the states.
Thanks