CQC - Error

[Geo82]

Hi all,
I am trying to implement the CQC from the responseSpectrum routine but smth is wrong and the results are too big in magnitude. I am trying to fogure out what I am doing wrong, any ideas will be appreciated.

[STKO Team]

Can you attach your Tcl files (Zipped) ?

[Geo82]

zip file attached

[STKO Team]

Here's the modified file.
You were combining only the 3rd column.

Now I set up a script that combines all components.
Then it creates a Nx12 matrix (stored in a file) where N is the number of elements, with the CQC-combined forces.

responseSpectrum.zip

(2.22 KiB) Downloaded 216 times

[Geo82]

it works really great!

[Geo82]

I am getting an error for a simple portal frame..

[Geo82]

portalFrame test

[STKO Team]

It was just a round-off error before computing the square root.
It can happen when a mode is not excited in the requested direction.

Now I added a small check to handle this rare round-off errors

responseSpectrum.zip

(2.36 KiB) Downloaded 215 times