How to get modal participating mass ratios directly?

popecl · Post by **popecl** » Sat Dec 15, 2007 6:59 pm

Hello everybody:
How to get modal participating mass ratios or modal participation factors in opensees directly?

Thanks for your attention!

ingLuca · Post by **ingLuca** » Mon Dec 17, 2007 7:57 am

I don't know if something has changed after v1.7.3, but OpenSEES doesn't have a command or a direct procedure to obtain the various modal coefficients.
You have to apply their definitions and calculate them by yourself. It's also possible to write some procedures to do that automatically, but it requires to have some programming skills and a lot of time

. Perhaps there is some procedure between the examples, or in the "script" section of the forum.

popecl · Post by **popecl** » Wed Dec 19, 2007 9:28 am

Thanks for your reply！I have already written some codes to calculate modal participating mass ratios and modal participation factors.

silvia · Post by **silvia** » Wed Dec 19, 2007 9:48 am

it'd be great if you could share them with the community.
if you put together a nice example, i could add it to the examples library with your name right on top!

popecl · Post by **popecl** » Sun Dec 23, 2007 5:44 am

If my codes are verified, I'm willing to share them with everybody！