Hi, well, a TLCD is basically:

A tuned liquid column damper (TLCD) consists of a U-shaped tank, comprising two vertical tubes and one horizontal tube, filled with water. The effect of the TLCD on the structural response is attributed to the out-of-phase oscillation of the liquid with respect to the structure to which the TLCD is attached.

The Picture is attached, i have done so far the model of the 4 DOF structure and now I'm working in parallel with the TLCD model...


Thanks in Advance!