Modal analysis - results exported - need to compute deflecti

[nr765]

Hello,

I have got results for a modal analysis (mesh of 150 shell elements) in ascii format. I have also got (from another process) forces to apply at each element; how do it compute the deflection? I get that it's a form of summation of all the modes, but I am stuck.

Thanks! BB

 

[Nidum]

Sorry but your posting doesn't make any sense at all .

Please explain more clearly what you are trying to do .

 

[nr765]

Sorry! here are more details.
I have done a modal analysis in a FEA software, I have looked at the modal shapes and frequencies (i.e. checked that everything made sense).
I'd like to use those results in a Fluid Structure Interaction (FSI) analysis where deflections are computed using modal superposition.

So what I have are 1/ the modal analysis results and 2/ the fluid forces (at each element). I'd like to "combine" them to yield the deflections.

Thanks,
Bb

 

[nr765]

What I am trying to achieved is described in section 2.B of this [paper](http://resources.altair.com/altairatc.com/country/united%20kingdom/atc2013_altair_fs_bonus2.pdf).