PARAMETRIC OPTIMIZATION OF TLCD-MAIN STRUCTURE COUPLED SYSTEM SUBJECT TO ARBITRARY STOCHASTIC EXCITATION

Resumo

The vibration levels in slender structures, such as walkways, bridges, high towers, and wind
turbines, are receiving more importance with free span increase. To preserve the structure lifespan, it is
necessary to study additional mechanical devices capable of reducing the vibrational level of the main
structure. Tuned Liquid Column Damper (TLCD) is a kind of passive absorber composed by a U-shaped
tube filled with liquid, commonly, water. This study performs a parametric optimization using response
maps to obtain TLCD optimum parameters to several arbitrary stochastic excitation. First of all, the
optimum parameters of TLCD coupled to the main structure using response maps were compared to
the analytical solution. Finally, the same procedure was reproduced to obtain an optimal parameter for
other arbitrary stochastic excitation. The result obtained show a reasonable accuracy compared to the
analytical solution. With this validation performed, we obtain the optimum values for Kaimal wind
spectrum.