How modeling tuned liquid column gass damper in opensees?

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eftekhar
Posts: 13
Joined: Fri Apr 30, 2021 6:08 am

How modeling tuned liquid column gass damper in opensees?

Post by eftekhar » Fri Aug 27, 2021 4:24 am

hi
my thesis is about new damper named tlcgd (tuned liquid column gass damper) wich has a special damping coefficint and stiffness coeeficinet in it's equation of motion. i tried to model damper with using viscouse damper material and two node link element. first i evalute damper coefficinet in damper equation of motion ( which i find in chuan fu thesis). first i evaluate damping coefficient and stiffness ratio, then i import these into viscous damper material which i evaluate from equation of motion. but i think something wrong because i could not verify my model with last works. i think my problem may cuses from three things. first in my resourse, forces in motion eqution is different from force i subject to my damper in opensees and i don't know how can i fix it. second, it's about boundry condition of dampers wich i am very skeptical about it. (i used two rigid link for link two node element with center of mass). third, maybe i choosed a uncorrect way to model my damper, i mean material and element.
i share my modeling in opensees and equation of damper motion and also the force and moment which damper release.
by difference in results, i mean different in damper dispalcement and also whole model dispalcement presence of dampers.
if you ever modeling damper like this in opensees or have any idea, i am very grateful for your help
wish you best.
https://drive.google.com/file/d/1lm_5pd ... sp=sharing
https://drive.google.com/file/d/1_K2Hfk ... sp=sharing

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