Transforming Method of TLCD-structure to TMD-structure for Vibration Control

Tuned Liquid Column Damper (TLCD) relies on the motion of a liquid mass in an open tube counteract the external motion, while a built-in orifice plate induces turbulent damping forces that dissipate kinetic energy. Although both the construction and working principle of TLCD differ from Tuned Mass Damper (TMD), the analogies between TLCD-structure and TMD-structure system for symmetric and asymmetric structures are given. The mass ratio, the optimal frequency ratio, the natural frequency and damping of the main structure, etc are achieved. Modal tuning of the TLCD, frequency ratio and damping, is classically done by applying the Den Hartog optimization criterion. The analysis of structural vibration control using finite element software is presented. Numerical simulations of the four-storey asymmetric structure and 20-storey benchmark model with single TLCD or TLCDs with the parameters using Den Hartog formula and structural analysis by SAP 2000 software show that the method of transforming TLCD-structure to TMD-structure system is reasonable and feasible.