# Modal analysis - results exported - need to compute deflecti

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1. Jul 26, 2017

### 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

2. Jul 26, 2017

### Nidum

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

Please explain more clearly what you are trying to do .

3. Jul 26, 2017

### 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

4. Jul 26, 2017